189891306072 has 96 divisors (see below), whose sum is σ = 574362668880. Its totient is φ = 58428086400.

The previous prime is 189891306071. The next prime is 189891306079. The reversal of 189891306072 is 270603198981.

189891306072 is a `hidden beast` number, since 18 + 9 + 8 + 9 + 13 + 0 + 607 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189891306071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3731679 + ... + 3782222.

Almost surely, 2^189891306072 is an apocalyptic number.

189891306072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

189891306072 is an abundant number, since it is smaller than the sum of its proper divisors (384471362808).

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

189891306072 is a wasteful number, since it uses less digits than its factorization.

189891306072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7513935 (or 7513919 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The spelling of 189891306072 in words is "one hundred eighty-nine billion, eight hundred ninety-one million, three hundred six thousand, seventy-two".