656405563113 has 6 divisors (see below), whose sum is σ = 948141368954. Its totient is φ = 437603708736.

The previous prime is 656405563111. The next prime is 656405563129. The reversal of 656405563113 is 311365504656.

It is a happy number.

656405563113 is a `hidden beast` number, since 6 + 5 + 6 + 4 + 0 + 5 + 5 + 631 + 1 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 654040977984 + 2364585129 = 808728^2 + 48627^2 .

It is not a de Polignac number, because 656405563113 - 2¹ = 656405563111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656405563111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36466975720 + ... + 36466975737.

Almost surely, 2^656405563113 is an apocalyptic number.

It is an amenable number.

656405563113 is a deficient number, since it is larger than the sum of its proper divisors (291735805841).

656405563113 is a wasteful number, since it uses less digits than its factorization.

656405563113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72933951463 (or 72933951460 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 45.

The spelling of 656405563113 in words is "six hundred fifty-six billion, four hundred five million, five hundred sixty-three thousand, one hundred thirteen".