188816664 has 16 divisors (see below), whose sum is σ = 472041720. Its totient is φ = 62938880.

The previous prime is 188816657. The next prime is 188816669. The reversal of 188816664 is 466618881.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188816669) 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 in 3 ways as a sum of consecutive naturals, for example, 3933657 + ... + 3933704.

Almost surely, 2^188816664 is an apocalyptic number.

It is an amenable number.

188816664 is an abundant number, since it is smaller than the sum of its proper divisors (283225056).

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

188816664 is a wasteful number, since it uses less digits than its factorization.

188816664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7867370 (or 7867366 counting only the distinct ones).

The product of its digits is 442368, while the sum is 48.

The square root of 188816664 is about 13741.0576012183. The cubic root of 188816664 is about 573.6937344020.

The spelling of 188816664 in words is "one hundred eighty-eight million, eight hundred sixteen thousand, six hundred sixty-four".