16536564 has 36 divisors (see below), whose sum is σ = 45601920. Its totient is φ = 5010960.

The previous prime is 16536511. The next prime is 16536577. The reversal of 16536564 is 46563561.

16536564 is a `hidden beast` number, since 1 + 65 + 36 + 564 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20484 + ... + 21275.

It is an arithmetic number, because the mean of its divisors is an integer number (1266720).

Almost surely, 2^16536564 is an apocalyptic number.

It is an amenable number.

16536564 is an abundant number, since it is smaller than the sum of its proper divisors (29065356).

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

16536564 is a wasteful number, since it uses less digits than its factorization.

16536564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41780 (or 41775 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 16536564 is about 4066.5174289556. The cubic root of 16536564 is about 254.7700811082.

The spelling of 16536564 in words is "sixteen million, five hundred thirty-six thousand, five hundred sixty-four".