189276561028 has 12 divisors (see below), whose sum is σ = 331237100880. Its totient is φ = 94637389352.

The previous prime is 189276561017. The next prime is 189276561053. The reversal of 189276561028 is 820165672981.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 189276561028.

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, 563175 + ... + 834097.

It is an arithmetic number, because the mean of its divisors is an integer number (27603091740).

Almost surely, 2^189276561028 is an apocalyptic number.

It is an amenable number.

189276561028 is a deficient number, since it is larger than the sum of its proper divisors (141960539852).

189276561028 is a wasteful number, since it uses less digits than its factorization.

189276561028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445586 (or 445584 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 189276561028 in words is "one hundred eighty-nine billion, two hundred seventy-six million, five hundred sixty-one thousand, twenty-eight".