161872312894 has 16 divisors (see below), whose sum is σ = 242992577520. Its totient is φ = 80874815040.

The previous prime is 161872312883. The next prime is 161872312909. The reversal of 161872312894 is 498213278161.

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, 25983772 + ... + 25990000.

It is an arithmetic number, because the mean of its divisors is an integer number (15187036095).

Almost surely, 2^161872312894 is an apocalyptic number.

161872312894 is a deficient number, since it is larger than the sum of its proper divisors (81120264626).

161872312894 is a wasteful number, since it uses less digits than its factorization.

161872312894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13995.

The product of its digits is 1161216, while the sum is 52.

The spelling of 161872312894 in words is "one hundred sixty-one billion, eight hundred seventy-two million, three hundred twelve thousand, eight hundred ninety-four".