189964836726 has 16 divisors (see below), whose sum is σ = 434205341184. Its totient is φ = 54275667624.

The previous prime is 189964836707. The next prime is 189964836731. The reversal of 189964836726 is 627638469981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2261486110 + ... + 2261486193.

It is an arithmetic number, because the mean of its divisors is an integer number (27137833824).

Almost surely, 2^189964836726 is an apocalyptic number.

189964836726 is an abundant number, since it is smaller than the sum of its proper divisors (244240504458).

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

189964836726 is a wasteful number, since it uses less digits than its factorization.

189964836726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4522972315.

The product of its digits is 188116992, while the sum is 69.

The spelling of 189964836726 in words is "one hundred eighty-nine billion, nine hundred sixty-four million, eight hundred thirty-six thousand, seven hundred twenty-six".