189391304736 has 120 divisors (see below), whose sum is σ = 557194494780. Its totient is φ = 63107776512.

The previous prime is 189391304717. The next prime is 189391304741. The reversal of 189391304736 is 637403193981.

It is a happy number.

189391304736 is a `hidden beast` number, since 1 + 8 + 9 + 39 + 130 + 473 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 151305440400 + 38085864336 = 388980^2 + 195156^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8202520 + ... + 8225576.

Almost surely, 2^189391304736 is an apocalyptic number.

189391304736 is a gapful number since it is divisible by the number (16) 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 189391304736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278597247390).

189391304736 is an abundant number, since it is smaller than the sum of its proper divisors (367803190044).

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

189391304736 is a wasteful number, since it uses less digits than its factorization.

189391304736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26248 (or 26231 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The spelling of 189391304736 in words is "one hundred eighty-nine billion, three hundred ninety-one million, three hundred four thousand, seven hundred thirty-six".