188194661808 has 80 divisors (see below), whose sum is σ = 514835593056. Its totient is φ = 59033681920.

The previous prime is 188194661797. The next prime is 188194661861. The reversal of 188194661808 is 808166491881.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11932648 + ... + 11948408.

Almost surely, 2^188194661808 is an apocalyptic number.

It is an amenable number.

188194661808 is an abundant number, since it is smaller than the sum of its proper divisors (326640931248).

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

188194661808 is a wasteful number, since it uses less digits than its factorization.

188194661808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30422 (or 30416 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 60.

The spelling of 188194661808 in words is "one hundred eighty-eight billion, one hundred ninety-four million, six hundred sixty-one thousand, eight hundred eight".