16645164 has 24 divisors (see below), whose sum is σ = 38911488. Its totient is φ = 5538000.

The previous prime is 16645163. The next prime is 16645177. The reversal of 16645164 is 46154661.

It is a happy number.

It is a super-2 number, since 2×16645164² = 554122969173792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16645163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8089 + ... + 9935.

It is an arithmetic number, because the mean of its divisors is an integer number (1621312).

Almost surely, 2^16645164 is an apocalyptic number.

It is an amenable number.

16645164 is an abundant number, since it is smaller than the sum of its proper divisors (22266324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16645164 is a wasteful number, since it uses less digits than its factorization.

16645164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2605 (or 2603 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 16645164 is about 4079.8485266000. The cubic root of 16645164 is about 255.3265788801.

The spelling of 16645164 in words is "sixteen million, six hundred forty-five thousand, one hundred sixty-four".