99890529975625 has 15 divisors (see below), whose sum is σ = 124823518487283. Its totient is φ = 79912224090000.

The previous prime is 99890529975623. The next prime is 99890529975631. The reversal of 99890529975625 is 52657992509899.

It is a happy number.

The square root of 99890529975625 is 9994525.

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 54218289976249 + 45672239999376 = 7363307^2 + 6758124^2 .

It is not a de Polignac number, because 99890529975625 - 2¹ = 99890529975623 is a prime.

It is a super-2 number, since 2×99890529975625² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99890529975623) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 249663235 + ... + 250063015.

Almost surely, 2^{99890529975625} is an apocalyptic number.

99890529975625 is the 9994525-th square number.

99890529975625 is the 4997263-rd centered octagonal number.

It is an amenable number.

99890529975625 is a deficient number, since it is larger than the sum of its proper divisors (24932988511658).

99890529975625 is an frugal number, since it uses more digits than its factorization.

99890529975625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799582 (or 399786 counting only the distinct ones).

The product of its (nonzero) digits is 9920232000, while the sum is 85.

The spelling of 99890529975625 in words is "ninety-nine trillion, eight hundred ninety billion, five hundred twenty-nine million, nine hundred seventy-five thousand, six hundred twenty-five".