189775939184680 has 128 divisors (see below), whose sum is σ = 442447487460000. Its totient is φ = 73172122619904.

The previous prime is 189775939184639. The next prime is 189775939184681. The reversal of 189775939184680 is 86481939577981.

It can be written as a sum of positive squares in 16 ways, for example, as 41038450327876 + 148737488856804 = 6406126^2 + 12195798^2 .

It is not an unprimeable number, because it can be changed into a prime (189775939184681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2243463826 + ... + 2243548414.

Almost surely, 2^{189775939184680} is an apocalyptic number.

189775939184680 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 189775939184680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221223743730000).

189775939184680 is an abundant number, since it is smaller than the sum of its proper divisors (252671548275320).

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

189775939184680 is a wasteful number, since it uses less digits than its factorization.

189775939184680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87791 (or 87787 counting only the distinct ones).

The product of its (nonzero) digits is 6584094720, while the sum is 85.

The spelling of 189775939184680 in words is "one hundred eighty-nine trillion, seven hundred seventy-five billion, nine hundred thirty-nine million, one hundred eighty-four thousand, six hundred eighty".