189859985392 has 160 divisors (see below), whose sum is σ = 476212377600. Its totient is φ = 71153510400.

The previous prime is 189859985353. The next prime is 189859985401. The reversal of 189859985392 is 293589958981.

189859985392 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9672484 + ... + 9692092.

It is an arithmetic number, because the mean of its divisors is an integer number (2976327360).

Almost surely, 2^189859985392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189859985392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238106188800).

189859985392 is an abundant number, since it is smaller than the sum of its proper divisors (286352392208).

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

189859985392 is a wasteful number, since it uses less digits than its factorization.

189859985392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19935 (or 19929 counting only the distinct ones).

The product of its digits is 503884800, while the sum is 76.

The spelling of 189859985392 in words is "one hundred eighty-nine billion, eight hundred fifty-nine million, nine hundred eighty-five thousand, three hundred ninety-two".