13539564 has 18 divisors (see below), whose sum is σ = 34225100. Its totient is φ = 4513176.

The previous prime is 13539563. The next prime is 13539583. The reversal of 13539564 is 46593531.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 376099 = 13539564 / (1 + 3 + 5 + 3 + 9 + 5 + 6 + 4).

It is not an unprimeable number, because it can be changed into a prime (13539563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 188014 + ... + 188085.

Almost surely, 2^13539564 is an apocalyptic number.

It is an amenable number.

13539564 is an abundant number, since it is smaller than the sum of its proper divisors (20685536).

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

13539564 is a wasteful number, since it uses less digits than its factorization.

13539564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376109 (or 376104 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 13539564 is about 3679.6146537375. The cubic root of 13539564 is about 238.3425381006.

The spelling of 13539564 in words is "thirteen million, five hundred thirty-nine thousand, five hundred sixty-four".