656427724656 has 80 divisors (see below), whose sum is σ = 1958752274688. Its totient is φ = 187216460800.

The previous prime is 656427724567. The next prime is 656427724691.

656427724656 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 656427724656.

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, 36556740 + ... + 36574691.

Almost surely, 2^656427724656 is an apocalyptic number.

656427724656 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

656427724656 is an abundant number, since it is smaller than the sum of its proper divisors (1302324550032).

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

656427724656 is a wasteful number, since it uses less digits than its factorization.

656427724656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73131470 (or 73131464 counting only the distinct ones).

The product of its digits is 101606400, while the sum is 60.

The spelling of 656427724656 in words is "six hundred fifty-six billion, four hundred twenty-seven million, seven hundred twenty-four thousand, six hundred fifty-six".