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Large Numbers

Diagram Description automatically generated

Name

Number

Million

1 x 10 6

Billion

1 x 10 9

Trillion

1 x 10 12

Quadrillion

1 x 10 15

Quintillion

1 x 10 18

Sextillion

1 x 10 21

Septillion

1 x 10 24

Octillion

1 x 10 27

Nonillion

1 x 10 30

Decillion

1 x 10 33

Undecillion

1 x 10 36

Duodecillion

1 x 10 39

Tredecillion

1 x 10 42

Quattuordecillion

1 x 10 45

Quindecillion

1 x 10 48

Sexdecillion

1 x 10 51

Septendecillion

1 x 10 54

Octodecillion

1 x 10 57

Novemdecillion

1 x 10 60

Vigintillion

1 x 10 63

Unvigintillion

1 x 10 66

Duovigintillion

1 x 10 69

Trevigintillion

1 x 10 72

Quattuorvigintillion

1 x 10 75

Quinvigintillion

1 x 10 78

Sexvigintillion

1 x 10 81

Septenvigintillion

1 x 10 84

Octovigintillion

1 x 10 87

Nonvigintillion

1 x 10 90

Trigintillion

1 x 10 93

Untrigintillion

1 x 10 96

Duotrigintillion

1 x 10 99

Ten-duotrigintillion (or Googol)

1 x 10 100

Skewer's Number

1 x 10 130

Centillion

1 x 10 303

 

Googolplex

                                         100

1 x 10 10

 

A googol, or a 1 with one hundred zeros after it, looks like this when written out:

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.

Writing a large number out like that can sometimes give a better sense of how big it actually is compared to using scientific notation.

A googolplex is 1 followed by a googol of zeros. A googolplex is such an enormous number that there really is no known use for it yet in math, and some mathematicians and astronomers hypothesize that a googolplex is even greater than the number of atoms in the universe.

But, there are numbers even larger than a googolplex. Skewes' number, developed by mathematician Stanley Skewes is 10 to the 10th to the 10th to the 34th. Skewes was particularly interested in prime numbers, and, when his number was introduced in 1933, it was described by a colleague as "largest number which has ever served any definite purpose in mathematics."

However, Skewes' number has since lost that distinction to Graham's number, which is currently designated as the world's largest number. Graham's number, which cannot be written with conventional notation, was developed by mathematician R.L. Graham. It is so large that, even if all the matter in the universe was converted to pens and ink, it still wouldn't be enough to write out the number in its entirety.

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