99311688525625 has 15 divisors (see below), whose sum is σ = 124100197305403. Its totient is φ = 79449151510000.

The previous prime is 99311688525617. The next prime is 99311688525659. The reversal of 99311688525625 is 52652588611399.

The square root of 99311688525625 is 9965525.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 74429908434729 + 24881780090896 = 8627277^2 + 4988164^2 .

It is not a de Polignac number, because 99311688525625 - 2³ = 99311688525617 is a prime.

It is a super-2 number, since 2×99311688525625² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 248938815 + ... + 249337435.

Almost surely, 2^{99311688525625} is an apocalyptic number.

99311688525625 is the 9965525-th square number.

99311688525625 is the 4982763-rd centered octagonal number.

It is an amenable number.

99311688525625 is a deficient number, since it is larger than the sum of its proper divisors (24788508779778).

99311688525625 is an frugal number, since it uses more digits than its factorization.

99311688525625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797262 (or 398626 counting only the distinct ones).

The product of its digits is 279936000, while the sum is 70.

The spelling of 99311688525625 in words is "ninety-nine trillion, three hundred eleven billion, six hundred eighty-eight million, five hundred twenty-five thousand, six hundred twenty-five".