25640445601156 has 12 divisors (see below), whose sum is σ = 45502762616640. Its totient is φ = 12639656282120.

The previous prime is 25640445601123. The next prime is 25640445601181. The reversal of 25640445601156 is 65110654404652.

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, 45141629296 + ... + 45141629863.

It is an arithmetic number, because the mean of its divisors is an integer number (3791896884720).

Almost surely, 2^{25640445601156} is an apocalyptic number.

It is an amenable number.

25640445601156 is a deficient number, since it is larger than the sum of its proper divisors (19862317015484).

25640445601156 is a wasteful number, since it uses less digits than its factorization.

25640445601156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90283259234 (or 90283259232 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 49.

The spelling of 25640445601156 in words is "twenty-five trillion, six hundred forty billion, four hundred forty-five million, six hundred one thousand, one hundred fifty-six".