656801264 has 40 divisors (see below), whose sum is σ = 1488178560. Its totient is φ = 274938048.

The previous prime is 656801237. The next prime is 656801269. The reversal of 656801264 is 462108656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656801269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63374 + ... + 73005.

It is an arithmetic number, because the mean of its divisors is an integer number (37204464).

Almost surely, 2^656801264 is an apocalyptic number.

It is an amenable number.

656801264 is an abundant number, since it is smaller than the sum of its proper divisors (831377296).

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

656801264 is a wasteful number, since it uses less digits than its factorization.

656801264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136437 (or 136431 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 656801264 is about 25628.1342278364. The cubic root of 656801264 is about 869.2499211646.

The spelling of 656801264 in words is "six hundred fifty-six million, eight hundred one thousand, two hundred sixty-four".