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A Sedecicentillion (1 Sedecicentillion) is 10 to the power of 351 (10^351). This is an excessively astronomical number!

How many zeros in a Sedecicentillion?

There are 351 zeros in a Sedecicentillion.

What's before Sedecicentillion?

A Quindecicentillion is smaller than a Sedecicentillion.

What's after Sedecicentillion?

A Septendecicentillion is larger than a Sedecicentillion.


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

Is Sedecicentillion the largest number?

Sedecicentillion 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.

Sedecicentillion written out

Sedecicentillion is written out as:


Big Numbers

This is just one of many really big numbers!

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