13591664 has 20 divisors (see below), whose sum is σ = 26977440. Its totient is φ = 6629760.

The previous prime is 13591657. The next prime is 13591681. The reversal of 13591664 is 46619531.

13591664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 9704 + ... + 11015.

It is an arithmetic number, because the mean of its divisors is an integer number (1348872).

Almost surely, 2^13591664 is an apocalyptic number.

It is an amenable number.

13591664 is a deficient number, since it is larger than the sum of its proper divisors (13385776).

13591664 is a wasteful number, since it uses less digits than its factorization.

13591664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20768 (or 20762 counting only the distinct ones).

The product of its digits is 19440, while the sum is 35.

The square root of 13591664 is about 3686.6874019911. The cubic root of 13591664 is about 238.6478594184.

The spelling of 13591664 in words is "thirteen million, five hundred ninety-one thousand, six hundred sixty-four".