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how many zeroes are there in an octillion?

how many zeroes are there in an octillion?

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Have ever wondered how many zeroes are in a million? A billion? A trillion? Do you know how many zeros there are in a vigintillion? Someday you may need to know this for science or math class. Then again, you might just want to impress a friend or teacher.

Numbers Bigger Than a Trillion

The digit zero plays an important role as you count very large numbers. It helps track these multiples of 10 because the larger the number is, the more zeroes are needed. In the table below, the first column lists the name of the number, the second provides the number of zeros that follow the initial digit, and the third tells you how many groups of three zeros you would need to write out each number.

All of Those Zeroes

A table like the one above can certainly be helpful in listing the names of all of the numbers depending on how many zeros they have. But it can be really mind-boggling to see just what some of those numbers look like. Below is a listing—including all the zeros—for the numbers up to decillion—a little more than just half the numbers listed in the above table.

Ten: 10 (1 zero)
Hundred: 100 (2 zeros)
Thousand: 1000 (3 zeros)
Ten thousand 10,000 (4 zeros)
Hundred thousand 100,000 (5 zeros)
Million 1,000,000 (6 zeros)
Billion 1,000,000,000 (9 zeros)
Trillion 1,000,000,000,000 (12 zeros)
Quadrillion 1,000,000,000,000,000 (15 zeros)
Quintillion 1,000,000,000,000,000,000 (18 zeros)
Sextillion 1,000,000,000,000,000,000,000 (21 zeros)
Septillion 1,000,000,000,000,000,000,000,000 (24 zeros)
Octillion 1,000,000,000,000,000,000,000,000,000 (27 zeros)
Nonillion 1,000,000,000,000,000,000,000,000,000,000 (30 zeros)
Decillion 1,000,000,000,000,000,000,000,000,000,000,000 (33 zeros)

Zeros Grouped in Sets of 3

Reference to sets of zeros is reserved for groupings of three zeros, meaning they are not relevant for smaller numbers. We write numbers with commas separating sets of three zeros so that it’s easier to read and understand the value. For example, you write one million as 1,000,000 rather than 1000000.

As another example, it’s much easier to remember that a trillion is written with four sets of three zeros than it is to count out 12 separate zeroes. While you might think that that one is pretty simple, just wait until you have to count 27 zeros for an octillion or 303 zeros for a centillion.

It is then that you will be thankful that you only have to remember nine and 101 sets of zeros, respectively.

Numbers With Very Large Numbers of Zeros

The number googol , has 100 zeros after it. Here’s what a googol looks like, including all of its required zeros:

10,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000

Do you think that number is big? How about the googolplex, which is a one followed by a googol of zeros. The googolplex is so large it doesn’t have any meaningful use yet—it is larger than the number of atoms in the universe.

Million and Billion: Some Differences

In the United States—as well as around the world in science and finance—a billion is 1,000 million, which is written as a one followed by nine zeros. This is also called the “short scale.”

There is also a “long scale,” which is used in France and was previously used in the United Kingdom, in which a billion means one million million. According to this definition of a billion, the number is written with a one followed by 12 zeros. The short scale and long scale were described by French mathematician Genevieve Guitel in 1975.

Hierarchy of Decimal Numbers

 Number Name How many 0 zero 1 one . 2 two .. 3 three … 4 four …. 5 five ….. 6 six …… 7 seven ……. 8 eight …….. 9 nine ……… 10 ten ……… 20 twenty two tens 30 thirty three tens 40 forty four tens 50 fifty five tens 60 sixty six tens 70 seventy seven tens 80 eighty eight tens 90 ninety nine tens
 Number Name How Many 100 one hundred ten tens 1,000 one thousand ten hundreds 10,000 ten thousand ten thousands 100,000 one hundred thousand one hundred thousands 1,000,000 one million one thousand thousands

Some people use a comma to mark every 3 digits. It just keeps track of the digits and makes the numbers easier to read.

Beyond a million, the names of the numbers differ depending where you live, and also the context. The places are grouped by thousands in countries using the “short scale” (such as the United States, Australia and English-speaking Canada), and by the millions in countries using the “long scale” (such as France and Germany). For further details on usage by country, see this article.

 Name Short scale Long scale million 1,000,000 1,000,000 billion 1,000,000,000 (a thousand millions) 1,000,000,000,000 (a million millions) trillion 1 with 12 zeros 1 with 18 zeros quadrillion 1 with 15 zeros 1 with 24 zeros quintillion 1 with 18 zeros 1 with 30 zeros sextillion 1 with 21 zeros 1 with 36 zeros septillion 1 with 24 zeros 1 with 42 zeros octillion 1 with 27 zeros 1 with 48 zeros googol 1 with 100 zeros googolplex 1 with a googol of zeros

Digits to the right of the decimal point represent the fractional part of the decimal number. Each place value has a value that is one tenth the value to the immediate left of it.

 Number Name Fraction .1 tenth 1/10 .01 hundredth 1/100 .001 thousandth 1/1000 .0001 ten thousandth 1/10000 .00001 hundred thousandth 1/100000

Examples:

0.234 = 234/1000 (said – point 2 3 4, or 234 thousandths, or two hundred thirty four thousandths)

4.83 = 4 83/100 (said – 4 point 8 3, or 4 and 83 hundredths)

 Number Prefix Symbol 10 1 deka- da 10 2 hecto- h 10 3 kilo- k 10 6 mega- M 10 9 giga- G 10 12 tera- T 10 15 peta- P 10 18 exa- E 10 21 zeta- Z 10 24 yotta- Y
 Number Prefix Symbol 10 -1 deci- d 10 -2 centi- c 10 -3 milli- m 10 -6 micro- u (greek mu) 10 -9 nano- n 10 -12 pico- p 10 -15 femto- f 10 -18 atto- a 10 -21 zepto- z 10 -24 yocto- y

 I=1 (I with a bar is not used) V=5 _ V=5,000 X=10 _ X=10,000 L=50 _ L=50,000 C=100 _ C = 100 000 D=500 _ D=500,000 M=1,000 _ M=1,000,000

Roman Numeral Calculator

Examples:

 ```1 = I 2 = II 3 = III 4 = IV 5 = V 6 = VI 7 = VII 8 = VIII 9 = IX 10 = X``` ```11 = XI 12 = XII 13 = XIII 14 = XIV 15 = XV 16 = XVI 17 = XVII 18 = XVIII 19 = XIX 20 = XX 21 = XXI``` ```25 = XXV 30 = XXX 40 = XL 49 = XLIX 50 = L 51 = LI 60 = LX 70 = LXX 80 = LXXX 90 = XC 99 = XCIX ```

There is no zero in the roman numeral system.

The numbers are built starting from the largest number on the left, and adding smaller numbers to the right. All the numerals are then added together.

The exception is the subtracted numerals, if a numeral is before a larger numeral, you subtract the first numeral from the second. That is, IX is 10 – 1= 9.

This only works for one small numeral before one larger numeral – for example, IIX is not 8, it is not a recognized roman numeral.

There is no place value in this system – the number III is 3, not 111.

Number Base Systems

 Decimal(10) Binary(2) Ternary(3) Octal(8) Hexadecimal(16) 0 0 0 0 0 1 1 1 1 1 2 10 2 2 2 3 11 10 3 3 4 100 11 4 4 5 101 12 5 5 6 110 20 6 6 7 111 21 7 7 8 1000 22 10 8 9 1001 100 11 9 10 1010 101 12 A 11 1011 102 13 B 12 1100 110 14 C 13 1101 111 15 D 14 1110 112 16 E 15 1111 120 17 F 16 10000 121 20 10 17 10001 122 21 11 18 10010 200 22 12 19 10011 201 23 13 20 10100 202 24 14

Each digit can only count up to the value of one less than the base. In hexadecimal, the letters A – F are used to represent the digits 10 – 15, so they would only use one character.

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