85902091025 has 24 divisors (see below), whose sum is σ = 107033625600. Its totient is φ = 68389776000.

The previous prime is 85902091013. The next prime is 85902091057. The reversal of 85902091025 is 52019020958.

It is a de Polignac number, because none of the positive numbers 2^k-85902091025 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11653541 + ... + 11660909.

It is an arithmetic number, because the mean of its divisors is an integer number (4459734400).

Almost surely, 2^85902091025 is an apocalyptic number.

It is an amenable number.

85902091025 is a deficient number, since it is larger than the sum of its proper divisors (21131534575).

85902091025 is a wasteful number, since it uses less digits than its factorization.

85902091025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9569 (or 9564 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 41.

The spelling of 85902091025 in words is "eighty-five billion, nine hundred two million, ninety-one thousand, twenty-five".