16165564 has 12 divisors (see below), whose sum is σ = 28688688. Its totient is φ = 7968800.

The previous prime is 16165547. The next prime is 16165571. The reversal of 16165564 is 46556161.

It is a happy number.

It is a super-2 number, since 2×16165564² = 522650918876192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28177 + ... + 28744.

It is an arithmetic number, because the mean of its divisors is an integer number (2390724).

Almost surely, 2^16165564 is an apocalyptic number.

It is an amenable number.

16165564 is a deficient number, since it is larger than the sum of its proper divisors (12523124).

16165564 is a wasteful number, since it uses less digits than its factorization.

16165564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56996 (or 56994 counting only the distinct ones).

The product of its digits is 21600, while the sum is 34.

The square root of 16165564 is about 4020.6422372551. The cubic root of 16165564 is about 252.8503856935.

The spelling of 16165564 in words is "sixteen million, one hundred sixty-five thousand, five hundred sixty-four".