656220033564 has 96 divisors (see below), whose sum is σ = 1561579052544. Its totient is φ = 214435952640.

The previous prime is 656220033533. The next prime is 656220033577. The reversal of 656220033564 is 465330022656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115467867 + ... + 115473549.

It is an arithmetic number, because the mean of its divisors is an integer number (16266448464).

Almost surely, 2^656220033564 is an apocalyptic number.

It is an amenable number.

656220033564 is an abundant number, since it is smaller than the sum of its proper divisors (905359018980).

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

656220033564 is a wasteful number, since it uses less digits than its factorization.

656220033564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6507 (or 6505 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 42.

The spelling of 656220033564 in words is "six hundred fifty-six billion, two hundred twenty million, thirty-three thousand, five hundred sixty-four".