13656694672 has 20 divisors (see below), whose sum is σ = 27174978076. Its totient is φ = 6643797120.

The previous prime is 13656694663. The next prime is 13656694691. The reversal of 13656694672 is 27649665631.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6959563776 + 6697130896 = 83424^2 + 81836^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11533779 + ... + 11534962.

Almost surely, 2^13656694672 is an apocalyptic number.

It is an amenable number.

13656694672 is a deficient number, since it is larger than the sum of its proper divisors (13518283404).

13656694672 is a wasteful number, since it uses less digits than its factorization.

13656694672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23068786 (or 23068780 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 55.

The spelling of 13656694672 in words is "thirteen billion, six hundred fifty-six million, six hundred ninety-four thousand, six hundred seventy-two".