656376564 has 48 divisors (see below), whose sum is σ = 1551699968. Its totient is φ = 215928288.

The previous prime is 656376563. The next prime is 656376569. The reversal of 656376564 is 465673656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656376563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 452889 + ... + 454335.

Almost surely, 2^656376564 is an apocalyptic number.

It is an amenable number.

656376564 is an abundant number, since it is smaller than the sum of its proper divisors (895323404).

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

656376564 is a wasteful number, since it uses less digits than its factorization.

656376564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1924 (or 1922 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 48.

The square root of 656376564 is about 25619.8470721431. The cubic root of 656376564 is about 869.0625230066.

The spelling of 656376564 in words is "six hundred fifty-six million, three hundred seventy-six thousand, five hundred sixty-four".