656215055136 has 72 divisors (see below), whose sum is σ = 1866269779920. Its totient is φ = 218719806336.

The previous prime is 656215055123. The next prime is 656215055137. The reversal of 656215055136 is 631550512656.

656215055136 is a `hidden beast` number, since 6 + 5 + 6 + 2 + 1 + 505 + 5 + 136 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a junction number, because it is equal to n+sod(n) for n = 656215055091 and 656215055100.

It is not an unprimeable number, because it can be changed into a prime (656215055137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3543991 + ... + 3724553.

It is an arithmetic number, because the mean of its divisors is an integer number (25920413610).

Almost surely, 2^656215055136 is an apocalyptic number.

It is an amenable number.

656215055136 is an abundant number, since it is smaller than the sum of its proper divisors (1210054724784).

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

656215055136 is a wasteful number, since it uses less digits than its factorization.

656215055136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193198 (or 193187 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The spelling of 656215055136 in words is "six hundred fifty-six billion, two hundred fifteen million, fifty-five thousand, one hundred thirty-six".