656120015996 has 24 divisors (see below), whose sum is σ = 1168320233136. Its totient is φ = 322326097920.

The previous prime is 656120015963. The next prime is 656120016011. The reversal of 656120015996 is 699510021656.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1261061 + ... + 1703676.

It is an arithmetic number, because the mean of its divisors is an integer number (48680009714).

Almost surely, 2^656120015996 is an apocalyptic number.

It is an amenable number.

656120015996 is a deficient number, since it is larger than the sum of its proper divisors (512200217140).

656120015996 is a wasteful number, since it uses less digits than its factorization.

656120015996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2965709 (or 2965707 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 50.

The spelling of 656120015996 in words is "six hundred fifty-six billion, one hundred twenty million, fifteen thousand, nine hundred ninety-six".