189360865728 has 84 divisors (see below), whose sum is σ = 542852907688. Its totient is φ = 63110499840.

The previous prime is 189360865703. The next prime is 189360865781. The reversal of 189360865728 is 827568063981.

189360865728 is a `hidden beast` number, since 18 + 9 + 3 + 608 + 6 + 5 + 7 + 2 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4340343 + ... + 4383753.

Almost surely, 2^189360865728 is an apocalyptic number.

189360865728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

189360865728 is an abundant number, since it is smaller than the sum of its proper divisors (353492041960).

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

189360865728 is a wasteful number, since it uses less digits than its factorization.

189360865728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51002 (or 50989 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 63.

The spelling of 189360865728 in words is "one hundred eighty-nine billion, three hundred sixty million, eight hundred sixty-five thousand, seven hundred twenty-eight".