188989309992 has 32 divisors (see below), whose sum is σ = 539969457600. Its totient is φ = 53996945664.

The previous prime is 188989309939. The next prime is 188989310009. The reversal of 188989309992 is 299903989881.

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, 562468017 + ... + 562468352.

It is an arithmetic number, because the mean of its divisors is an integer number (16874045550).

Almost surely, 2^188989309992 is an apocalyptic number.

188989309992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

188989309992 is an abundant number, since it is smaller than the sum of its proper divisors (350980147608).

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

188989309992 is a wasteful number, since it uses less digits than its factorization.

188989309992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124936385 (or 1124936381 counting only the distinct ones).

The product of its (nonzero) digits is 181398528, while the sum is 75.

The spelling of 188989309992 in words is "one hundred eighty-eight billion, nine hundred eighty-nine million, three hundred nine thousand, nine hundred ninety-two".