656007021632 has 14 divisors (see below), whose sum is σ = 1301763933678. Its totient is φ = 328003510784.

The previous prime is 656007021623. The next prime is 656007021643. The reversal of 656007021632 is 236120700656.

It can be written as a sum of positive squares in only one way, i.e., 652773507136 + 3233514496 = 807944^2 + 56864^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5125054793 + ... + 5125054920.

Almost surely, 2^656007021632 is an apocalyptic number.

It is an amenable number.

656007021632 is a deficient number, since it is larger than the sum of its proper divisors (645756912046).

656007021632 is a wasteful number, since it uses less digits than its factorization.

656007021632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10250109725 (or 10250109715 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 656007021632 in words is "six hundred fifty-six billion, seven million, twenty-one thousand, six hundred thirty-two".