189431715168 has 72 divisors (see below), whose sum is σ = 567048900600. Its totient is φ = 59820539904.

The previous prime is 189431715163. The next prime is 189431715169. The reversal of 189431715168 is 861517134981.

189431715168 is a `hidden beast` number, since 1 + 8 + 94 + 31 + 7 + 1 + 516 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×189431715168² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189431715163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17303713 + ... + 17314656.

It is an arithmetic number, because the mean of its divisors is an integer number (7875679175).

Almost surely, 2^189431715168 is an apocalyptic number.

189431715168 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

189431715168 is an abundant number, since it is smaller than the sum of its proper divisors (377617185432).

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

189431715168 is a wasteful number, since it uses less digits than its factorization.

189431715168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34618404 (or 34618393 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 54.

The spelling of 189431715168 in words is "one hundred eighty-nine billion, four hundred thirty-one million, seven hundred fifteen thousand, one hundred sixty-eight".