13639564 has 6 divisors (see below), whose sum is σ = 23869244. Its totient is φ = 6819780.

The previous prime is 13639553. The next prime is 13639631. The reversal of 13639564 is 46593631.

It is a super-2 number, since 2×13639564² = 372075412220192, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1704942 + ... + 1704949.

Almost surely, 2^13639564 is an apocalyptic number.

It is an amenable number.

13639564 is a deficient number, since it is larger than the sum of its proper divisors (10229680).

13639564 is a wasteful number, since it uses less digits than its factorization.

13639564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3409895 (or 3409893 counting only the distinct ones).

The product of its digits is 58320, while the sum is 37.

The square root of 13639564 is about 3693.1780352428. The cubic root of 13639564 is about 238.9278798284.

The spelling of 13639564 in words is "thirteen million, six hundred thirty-nine thousand, five hundred sixty-four".