189608659812 has 240 divisors, whose sum is σ = 612982708800. Its totient is φ = 50245712640.

The previous prime is 189608659783. The next prime is 189608659829. The reversal of 189608659812 is 218956806981.

189608659812 is a `hidden beast` number, since 1 + 8 + 9 + 608 + 6 + 5 + 9 + 8 + 12 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 189608659812.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 772614 + ... + 988002.

It is an arithmetic number, because the mean of its divisors is an integer number (2554094620).

Almost surely, 2^189608659812 is an apocalyptic number.

189608659812 is a gapful number since it is divisible by the number (12) 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 189608659812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306491354400).

189608659812 is an abundant number, since it is smaller than the sum of its proper divisors (423374048988).

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

189608659812 is a wasteful number, since it uses less digits than its factorization.

189608659812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215448 (or 215437 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 63.

The spelling of 189608659812 in words is "one hundred eighty-nine billion, six hundred eight million, six hundred fifty-nine thousand, eight hundred twelve".