16564432 has 10 divisors (see below), whose sum is σ = 32093618. Its totient is φ = 8282208.

The previous prime is 16564411. The next prime is 16564433. The reversal of 16564432 is 23446561.

It can be written as a sum of positive squares in only one way, i.e., 10394176 + 6170256 = 3224^2 + 2484^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16564394 and 16564403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16564433) 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, 517623 + ... + 517654.

Almost surely, 2^16564432 is an apocalyptic number.

It is an amenable number.

16564432 is a deficient number, since it is larger than the sum of its proper divisors (15529186).

16564432 is a wasteful number, since it uses less digits than its factorization.

16564432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035285 (or 1035279 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 16564432 is about 4069.9425057364. The cubic root of 16564432 is about 254.9131166263.

The spelling of 16564432 in words is "sixteen million, five hundred sixty-four thousand, four hundred thirty-two".