189977862272 has 128 divisors (see below), whose sum is σ = 436207161600. Its totient is φ = 81601085440.

The previous prime is 189977862223. The next prime is 189977862299. The reversal of 189977862272 is 272268779981.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1869608 + ... + 1968600.

It is an arithmetic number, because the mean of its divisors is an integer number (3407868450).

Almost surely, 2^189977862272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189977862272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218103580800).

189977862272 is an abundant number, since it is smaller than the sum of its proper divisors (246229299328).

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

189977862272 is a wasteful number, since it uses less digits than its factorization.

189977862272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99094 (or 99082 counting only the distinct ones).

The product of its digits is 85349376, while the sum is 68.

The spelling of 189977862272 in words is "one hundred eighty-nine billion, nine hundred seventy-seven million, eight hundred sixty-two thousand, two hundred seventy-two".