189983011608 has 144 divisors (see below), whose sum is σ = 560504009520. Its totient is φ = 58105651968.

The previous prime is 189983011571. The next prime is 189983011609. The reversal of 189983011608 is 806110389981.

189983011608 is a `hidden beast` number, since 18 + 9 + 9 + 8 + 3 + 0 + 11 + 608 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189983011609) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1985310 + ... + 2078802.

It is an arithmetic number, because the mean of its divisors is an integer number (3892388955).

Almost surely, 2^189983011608 is an apocalyptic number.

189983011608 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189983011608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280252004760).

189983011608 is an abundant number, since it is smaller than the sum of its proper divisors (370520997912).

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

189983011608 is a wasteful number, since it uses less digits than its factorization.

189983011608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93698 (or 93678 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 54.

The spelling of 189983011608 in words is "one hundred eighty-nine billion, nine hundred eighty-three million, eleven thousand, six hundred eight".