16564136 has 8 divisors (see below), whose sum is σ = 31057770. Its totient is φ = 8282064.

The previous prime is 16564129. The next prime is 16564157. The reversal of 16564136 is 63146561.

It can be written as a sum of positive squares in only one way, i.e., 9647236 + 6916900 = 3106^2 + 2630^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1035251 + ... + 1035266.

Almost surely, 2^16564136 is an apocalyptic number.

It is an amenable number.

16564136 is a deficient number, since it is larger than the sum of its proper divisors (14493634).

16564136 is a wasteful number, since it uses less digits than its factorization.

16564136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2070523 (or 2070519 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 16564136 is about 4069.9061414239. The cubic root of 16564136 is about 254.9115982177.

The spelling of 16564136 in words is "sixteen million, five hundred sixty-four thousand, one hundred thirty-six".