13553644 has 12 divisors (see below), whose sum is σ = 25543504. Its totient is φ = 6255504.

The previous prime is 13553633. The next prime is 13553671. The reversal of 13553644 is 44635531.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

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, 130272 + ... + 130375.

Almost surely, 2^13553644 is an apocalyptic number.

It is an amenable number.

13553644 is a deficient number, since it is larger than the sum of its proper divisors (11989860).

13553644 is a wasteful number, since it uses less digits than its factorization.

13553644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260664 (or 260662 counting only the distinct ones).

The product of its digits is 21600, while the sum is 31.

The square root of 13553644 is about 3681.5274004141. The cubic root of 13553644 is about 238.4251281637.

The spelling of 13553644 in words is "thirteen million, five hundred fifty-three thousand, six hundred forty-four".