90159070225 has 81 divisors (see below), whose sum is σ = 136315495953. Its totient is φ = 58976850240.

The previous prime is 90159070213. The next prime is 90159070241. The reversal of 90159070225 is 52207095109.

The square root of 90159070225 is 300265.

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

It can be written as a sum of positive squares in 4 ways, for example, as 868068369 + 89291001856 = 29463^2 + 298816^2 .

It is not a de Polignac number, because 90159070225 - 2⁷ = 90159070097 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 241713139 + ... + 241713511.

Almost surely, 2^90159070225 is an apocalyptic number.

90159070225 is the 300265-th square number.

90159070225 is the 150133-rd centered octagonal number.

It is an amenable number.

90159070225 is a deficient number, since it is larger than the sum of its proper divisors (46156425728).

90159070225 is an equidigital number, since it uses as much as digits as its factorization.

90159070225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816 (or 408 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 40.

The spelling of 90159070225 in words is "ninety billion, one hundred fifty-nine million, seventy thousand, two hundred twenty-five".