656404134036 has 24 divisors (see below), whose sum is σ = 1750411024320. Its totient is φ = 187544038272.

The previous prime is 656404134013. The next prime is 656404134047. The reversal of 656404134036 is 630431404656.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 3907167381 + ... + 3907167548.

It is an arithmetic number, because the mean of its divisors is an integer number (72933792680).

Almost surely, 2^656404134036 is an apocalyptic number.

It is an amenable number.

656404134036 is an abundant number, since it is smaller than the sum of its proper divisors (1094006890284).

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

656404134036 is a wasteful number, since it uses less digits than its factorization.

656404134036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7814334943 (or 7814334941 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 42.

The spelling of 656404134036 in words is "six hundred fifty-six billion, four hundred four million, one hundred thirty-four thousand, thirty-six".