189584968908 has 12 divisors (see below), whose sum is σ = 442364927480. Its totient is φ = 63194989632.

The previous prime is 189584968897. The next prime is 189584968913. The reversal of 189584968908 is 809869485981.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 189584968908.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7899373693 + ... + 7899373716.

Almost surely, 2^189584968908 is an apocalyptic number.

It is an amenable number.

189584968908 is an abundant number, since it is smaller than the sum of its proper divisors (252779958572).

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

189584968908 is a wasteful number, since it uses less digits than its factorization.

189584968908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15798747416 (or 15798747414 counting only the distinct ones).

The product of its (nonzero) digits is 358318080, while the sum is 75.

The spelling of 189584968908 in words is "one hundred eighty-nine billion, five hundred eighty-four million, nine hundred sixty-eight thousand, nine hundred eight".