13556564 has 24 divisors (see below), whose sum is σ = 27225408. Its totient is φ = 5785920.

The previous prime is 13556563. The next prime is 13556581. The reversal of 13556564 is 46565531.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13556563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7007 + ... + 8729.

It is an arithmetic number, because the mean of its divisors is an integer number (1134392).

Almost surely, 2^13556564 is an apocalyptic number.

13556564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

13556564 is an abundant number, since it is smaller than the sum of its proper divisors (13668844).

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

13556564 is a wasteful number, since it uses less digits than its factorization.

13556564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2015 (or 2013 counting only the distinct ones).

The product of its digits is 54000, while the sum is 35.

The square root of 13556564 is about 3681.9239535873. The cubic root of 13556564 is about 238.4422490547.

The spelling of 13556564 in words is "thirteen million, five hundred fifty-six thousand, five hundred sixty-four".