85121255025 has 48 divisors (see below), whose sum is σ = 156494745600. Its totient is φ = 45362047680.

The previous prime is 85121255017. The next prime is 85121255029. The reversal of 85121255025 is 52055212158.

85121255025 is a `hidden beast` number, since 8 + 5 + 121 + 25 + 502 + 5 = 666.

It is not a de Polignac number, because 85121255025 - 2³ = 85121255017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85121255029) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 814027 + ... + 912623.

It is an arithmetic number, because the mean of its divisors is an integer number (3260307200).

Almost surely, 2^85121255025 is an apocalyptic number.

It is an amenable number.

85121255025 is a deficient number, since it is larger than the sum of its proper divisors (71373490575).

85121255025 is a wasteful number, since it uses less digits than its factorization.

85121255025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99895 (or 99884 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 36.

The spelling of 85121255025 in words is "eighty-five billion, one hundred twenty-one million, two hundred fifty-five thousand, twenty-five".