16564625 has 32 divisors (see below), whose sum is σ = 25788672. Its totient is φ = 10320000.

The previous prime is 16564601. The next prime is 16564627. The reversal of 16564625 is 52646561.

16564625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16564625 - 2¹⁶ = 16499089 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (16564627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8765 + ... + 10485.

It is an arithmetic number, because the mean of its divisors is an integer number (805896).

Almost surely, 2^16564625 is an apocalyptic number.

It is an amenable number.

16564625 is a deficient number, since it is larger than the sum of its proper divisors (9224047).

16564625 is a wasteful number, since it uses less digits than its factorization.

16564625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754 (or 1744 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 16564625 is about 4069.9662160760. The cubic root of 16564625 is about 254.9141066601.

The spelling of 16564625 in words is "sixteen million, five hundred sixty-four thousand, six hundred twenty-five".