656464331508 has 24 divisors (see below), whose sum is σ = 1538105923200. Its totient is φ = 217913470080.

The previous prime is 656464331503. The next prime is 656464331527. The reversal of 656464331508 is 805133464656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656464331503) 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, 113493708 + ... + 113499491.

It is an arithmetic number, because the mean of its divisors is an integer number (64087746800).

Almost surely, 2^656464331508 is an apocalyptic number.

It is an amenable number.

656464331508 is an abundant number, since it is smaller than the sum of its proper divisors (881641591692).

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

656464331508 is a wasteful number, since it uses less digits than its factorization.

656464331508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226993447 (or 226993445 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 51.

The spelling of 656464331508 in words is "six hundred fifty-six billion, four hundred sixty-four million, three hundred thirty-one thousand, five hundred eight".