13656560 has 20 divisors (see below), whose sum is σ = 31751688. Its totient is φ = 5462592.

The previous prime is 13656557. The next prime is 13656581. The reversal of 13656560 is 6565631.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

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, 85274 + ... + 85433.

Almost surely, 2^13656560 is an apocalyptic number.

13656560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13656560 is an abundant number, since it is smaller than the sum of its proper divisors (18095128).

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

13656560 is a wasteful number, since it uses less digits than its factorization.

13656560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170720 (or 170714 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 13656560 is about 3695.4783181613. The cubic root of 13656560 is about 239.0270797908.

The spelling of 13656560 in words is "thirteen million, six hundred fifty-six thousand, five hundred sixty".