656464323464656 has 40 divisors (see below), whose sum is σ = 1455480038744064. Its totient is φ = 280977891876480.

The previous prime is 656464323464639. The next prime is 656464323464681.

656464323464656 is nontrivially palindromic in base 10.

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, 3791173840 + ... + 3791346991.

Almost surely, 2^{656464323464656} is an apocalyptic number.

It is an amenable number.

656464323464656 is an abundant number, since it is smaller than the sum of its proper divisors (799015715279408).

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

656464323464656 is a wasteful number, since it uses less digits than its factorization.

656464323464656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7582521619 (or 7582521613 counting only the distinct ones).

The product of its digits is 5374771200, while the sum is 70.

The spelling of 656464323464656 in words is "six hundred fifty-six trillion, four hundred sixty-four billion, three hundred twenty-three million, four hundred sixty-four thousand, six hundred fifty-six".