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A Unseptuagintillion (1 Unseptuagintillion) is 10 to the power of 216 (10^216). This is an extremely gargantuan number!

How many zeros in a Unseptuagintillion?

There are 216 zeros in a Unseptuagintillion.

What's before Unseptuagintillion?

A Septuagintillion is smaller than a Unseptuagintillion.

What's after Unseptuagintillion?

A Duoseptuagintillion is larger than a Unseptuagintillion.


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

Is Unseptuagintillion the largest number?

Unseptuagintillion 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.

Unseptuagintillion written out

Unseptuagintillion is written out as:


Big Numbers

This is just one of many really big numbers!

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