188664908920 has 32 divisors (see below), whose sum is σ = 424510657200. Its totient is φ = 75463365888.

The previous prime is 188664908897. The next prime is 188664908951. The reversal of 188664908920 is 29809466881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1453651 + ... + 1578109.

Almost surely, 2^188664908920 is an apocalyptic number.

188664908920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

188664908920 is an abundant number, since it is smaller than the sum of its proper divisors (235845748280).

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

188664908920 is a wasteful number, since it uses less digits than its factorization.

188664908920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162367 (or 162363 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 61.

The spelling of 188664908920 in words is "one hundred eighty-eight billion, six hundred sixty-four million, nine hundred eight thousand, nine hundred twenty".