656885588656 has 20 divisors (see below), whose sum is σ = 1388417267304. Its totient is φ = 298584358400.

The previous prime is 656885588603. The next prime is 656885588693.

656885588656 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1866152065 + ... + 1866152416.

Almost surely, 2^656885588656 is an apocalyptic number.

It is an amenable number.

656885588656 is an abundant number, since it is smaller than the sum of its proper divisors (731531678648).

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

656885588656 is a wasteful number, since it uses less digits than its factorization.

656885588656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3732304500 (or 3732304494 counting only the distinct ones).

The product of its digits is 3317760000, while the sum is 76.

The spelling of 656885588656 in words is "six hundred fifty-six billion, eight hundred eighty-five million, five hundred eighty-eight thousand, six hundred fifty-six".