7255931638656 has 64 divisors (see below), whose sum is σ = 19938174253200. Its totient is φ = 2335242362880.

The previous prime is 7255931638609. The next prime is 7255931638693. The reversal of 7255931638656 is 6568361395527.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325776025 + ... + 325798296.

Almost surely, 2^{7255931638656} is an apocalyptic number.

It is an amenable number.

7255931638656 is an abundant number, since it is smaller than the sum of its proper divisors (12682242614544).

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

7255931638656 is a wasteful number, since it uses less digits than its factorization.

7255931638656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651574367 (or 651574355 counting only the distinct ones).

The product of its digits is 244944000, while the sum is 66.

The spelling of 7255931638656 in words is "seven trillion, two hundred fifty-five billion, nine hundred thirty-one million, six hundred thirty-eight thousand, six hundred fifty-six".