13553664 has 52 divisors (see below), whose sum is σ = 36171456. Its totient is φ = 4513792.

The previous prime is 13553633. The next prime is 13553671. The reversal of 13553664 is 46635531.

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, 11737 + ... + 12839.

Almost surely, 2^13553664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13553664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18085728).

13553664 is an abundant number, since it is smaller than the sum of its proper divisors (22617792).

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

13553664 is an equidigital number, since it uses as much as digits as its factorization.

13553664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130 (or 1108 counting only the distinct ones).

The product of its digits is 32400, while the sum is 33.

The square root of 13553664 is about 3681.5301166770. The cubic root of 13553664 is about 238.4252454385.

The spelling of 13553664 in words is "thirteen million, five hundred fifty-three thousand, six hundred sixty-four".