656442164 has 12 divisors (see below), whose sum is σ = 1312884384. Its totient is φ = 281332344.

The previous prime is 656442109. The next prime is 656442203. The reversal of 656442164 is 461244656.

656442164 is an admirable number.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11722154 + ... + 11722209.

It is an arithmetic number, because the mean of its divisors is an integer number (109407032).

Almost surely, 2^656442164 is an apocalyptic number.

It is an amenable number.

656442164 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

656442164 is a wasteful number, since it uses less digits than its factorization.

656442164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23444374 (or 23444372 counting only the distinct ones).

The product of its digits is 138240, while the sum is 38.

The square root of 656442164 is about 25621.1272976034. The cubic root of 656442164 is about 869.0914741735.

The spelling of 656442164 in words is "six hundred fifty-six million, four hundred forty-two thousand, one hundred sixty-four".