188555978212 has 24 divisors (see below), whose sum is σ = 384808121600. Its totient is φ = 80809704360.

The previous prime is 188555978189. The next prime is 188555978243. The reversal of 188555978212 is 212879555881.

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, 68714364 + ... + 68717107.

Almost surely, 2^188555978212 is an apocalyptic number.

It is an amenable number.

188555978212 is an abundant number, since it is smaller than the sum of its proper divisors (196252143388).

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

188555978212 is a wasteful number, since it uses less digits than its factorization.

188555978212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137431496 (or 137431480 counting only the distinct ones).

The product of its digits is 16128000, while the sum is 61.

The spelling of 188555978212 in words is "one hundred eighty-eight billion, five hundred fifty-five million, nine hundred seventy-eight thousand, two hundred twelve".