191800136256684 has 24 divisors (see below), whose sum is σ = 449805395693808. Its totient is φ = 63608843833920.

The previous prime is 191800136256679. The next prime is 191800136256787. The reversal of 191800136256684 is 486652631008191.

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, 40566862327 + ... + 40566867054.

It is an arithmetic number, because the mean of its divisors is an integer number (18741891487242).

Almost surely, 2^{191800136256684} is an apocalyptic number.

It is an amenable number.

191800136256684 is an abundant number, since it is smaller than the sum of its proper divisors (258005259437124).

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

191800136256684 is a wasteful number, since it uses less digits than its factorization.

191800136256684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81133729585 (or 81133729583 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 60.

The spelling of 191800136256684 in words is "one hundred ninety-one trillion, eight hundred billion, one hundred thirty-six million, two hundred fifty-six thousand, six hundred eighty-four".