188817557972 has 48 divisors (see below), whose sum is σ = 342086310720. Its totient is φ = 91128864000.

The previous prime is 188817557963. The next prime is 188817558037. The reversal of 188817557972 is 279755718881.

It is a congruent number.

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, 29596679 + ... + 29603057.

It is an arithmetic number, because the mean of its divisors is an integer number (7126798140).

Almost surely, 2^188817557972 is an apocalyptic number.

It is an amenable number.

188817557972 is a deficient number, since it is larger than the sum of its proper divisors (153268752748).

188817557972 is a wasteful number, since it uses less digits than its factorization.

188817557972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8312 (or 8310 counting only the distinct ones).

The product of its digits is 79027200, while the sum is 68.

The spelling of 188817557972 in words is "one hundred eighty-eight billion, eight hundred seventeen million, five hundred fifty-seven thousand, nine hundred seventy-two".