189539203140 has 288 divisors, whose sum is σ = 670763358720. Its totient is φ = 42423533568.

The previous prime is 189539203109. The next prime is 189539203151. The reversal of 189539203140 is 41302935981.

It is a happy number.

189539203140 is a `hidden beast` number, since 1 + 89 + 539 + 2 + 0 + 31 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 38529601 + ... + 38534519.

It is an arithmetic number, because the mean of its divisors is an integer number (2329039440).

Almost surely, 2^189539203140 is an apocalyptic number.

189539203140 is a gapful number since it is divisible by the number (10) 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 189539203140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335381679360).

189539203140 is an abundant number, since it is smaller than the sum of its proper divisors (481224155580).

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

189539203140 is a wasteful number, since it uses less digits than its factorization.

189539203140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5571 (or 5566 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 189539203140 in words is "one hundred eighty-nine billion, five hundred thirty-nine million, two hundred three thousand, one hundred forty".