13656643164 has 36 divisors (see below), whose sum is σ = 34556746224. Its totient is φ = 4547495232.

The previous prime is 13656643163. The next prime is 13656643171. The reversal of 13656643164 is 46134665631.

13656643164 is a `hidden beast` number, since 1 + 36 + 566 + 43 + 16 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13656643163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161337 + ... + 230960.

Almost surely, 2^13656643164 is an apocalyptic number.

It is an amenable number.

13656643164 is an abundant number, since it is smaller than the sum of its proper divisors (20900103060).

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

13656643164 is a wasteful number, since it uses less digits than its factorization.

13656643164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393274 (or 393269 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

The spelling of 13656643164 in words is "thirteen billion, six hundred fifty-six million, six hundred forty-three thousand, one hundred sixty-four".