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A Septuagintillion (1 Septuagintillion) is 10 to the power of 213 (10^213). This is a very colossal number!

How many zeros in a Septuagintillion?

There are 213 zeros in a Septuagintillion.

What's before Septuagintillion?

A Novensexagintillion is smaller than a Septuagintillion.

What's after Septuagintillion?

A Unseptuagintillion is larger than a Septuagintillion.


A Septuagintillionaire is someone whos assets, net worth or wealth is 1 or more Septuagintillion. It is unlikely anyone will ever be a true Septuagintillionaire. If you want to be a Septuagintillionaire, play Tap Tales!

Is Septuagintillion the largest number?

Septuagintillion is not the largest number. Infinity best describes the largest possible number - if there even is one! We cannot comprehend what the largest number actually is.

Septuagintillion written out

Septuagintillion is written out as:


Big Numbers

This is just one of many really big numbers!

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