16805564 has 6 divisors (see below), whose sum is σ = 29409744. Its totient is φ = 8402780.

The previous prime is 16805563. The next prime is 16805573. The reversal of 16805564 is 46550861.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16805563) by changing a digit.

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, 2100692 + ... + 2100699.

It is an arithmetic number, because the mean of its divisors is an integer number (4901624).

Almost surely, 2^16805564 is an apocalyptic number.

It is an amenable number.

16805564 is a deficient number, since it is larger than the sum of its proper divisors (12604180).

16805564 is a wasteful number, since it uses less digits than its factorization.

16805564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4201395 (or 4201393 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 16805564 is about 4099.4589886959. The cubic root of 16805564 is about 256.1441042516.

The spelling of 16805564 in words is "sixteen million, eight hundred five thousand, five hundred sixty-four".