188939568772 has 12 divisors (see below), whose sum is σ = 336882816396. Its totient is φ = 92687335520.

The previous prime is 188939568739. The next prime is 188939568781. The reversal of 188939568772 is 277865939881.

It can be written as a sum of positive squares in 2 ways, for example, as 154241565696 + 34698003076 = 392736^2 + 186274^2 .

It is a junction number, because it is equal to n+sod(n) for n = 188939568695 and 188939568704.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 445611979 + ... + 445612402.

It is an arithmetic number, because the mean of its divisors is an integer number (28073568033).

Almost surely, 2^188939568772 is an apocalyptic number.

It is an amenable number.

188939568772 is a deficient number, since it is larger than the sum of its proper divisors (147943247624).

188939568772 is a wasteful number, since it uses less digits than its factorization.

188939568772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891224438 (or 891224436 counting only the distinct ones).

The product of its digits is 365783040, while the sum is 73.

The spelling of 188939568772 in words is "one hundred eighty-eight billion, nine hundred thirty-nine million, five hundred sixty-eight thousand, seven hundred seventy-two".