656887302868 has 48 divisors (see below), whose sum is σ = 1214102736000. Its totient is φ = 310354057728.

The previous prime is 656887302821. The next prime is 656887302881. The reversal of 656887302868 is 868203788656.

It is a super-2 number, since 2×656887302868² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9208723 + ... + 9279781.

It is an arithmetic number, because the mean of its divisors is an integer number (25293807000).

Almost surely, 2^656887302868 is an apocalyptic number.

It is an amenable number.

656887302868 is a deficient number, since it is larger than the sum of its proper divisors (557215433132).

656887302868 is a wasteful number, since it uses less digits than its factorization.

656887302868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72304 (or 72302 counting only the distinct ones).

The product of its (nonzero) digits is 185794560, while the sum is 67.

The spelling of 656887302868 in words is "six hundred fifty-six billion, eight hundred eighty-seven million, three hundred two thousand, eight hundred sixty-eight".