189434806512 has 80 divisors (see below), whose sum is σ = 561070874880. Its totient is φ = 53951279616.

The previous prime is 189434806481. The next prime is 189434806513. The reversal of 189434806512 is 215608434981.

It is a super-2 number, since 2×189434806512² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189434806513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 795462 + ... + 1005797.

It is an arithmetic number, because the mean of its divisors is an integer number (7013385936).

Almost surely, 2^189434806512 is an apocalyptic number.

189434806512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

189434806512 is an abundant number, since it is smaller than the sum of its proper divisors (371636068368).

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

189434806512 is a wasteful number, since it uses less digits than its factorization.

189434806512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801590 (or 1801584 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 51.

The spelling of 189434806512 in words is "one hundred eighty-nine billion, four hundred thirty-four million, eight hundred six thousand, five hundred twelve".