25501165512 has 16 divisors (see below), whose sum is σ = 63752913840. Its totient is φ = 8500388496.

The previous prime is 25501165507. The next prime is 25501165549. The reversal of 25501165512 is 21556110552.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531274258 + ... + 531274305.

It is an arithmetic number, because the mean of its divisors is an integer number (3984557115).

Almost surely, 2^25501165512 is an apocalyptic number.

It is an amenable number.

25501165512 is an abundant number, since it is smaller than the sum of its proper divisors (38251748328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25501165512 is a wasteful number, since it uses less digits than its factorization.

25501165512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062548572 (or 1062548568 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 33.

The spelling of 25501165512 in words is "twenty-five billion, five hundred one million, one hundred sixty-five thousand, five hundred twelve".