844391922166 has 64 divisors (see below), whose sum is σ = 1467399628800. Its totient is φ = 361095463296.

The previous prime is 844391922151. The next prime is 844391922167. The reversal of 844391922166 is 661229193448.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844391922167) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34652295 + ... + 34676653.

It is an arithmetic number, because the mean of its divisors is an integer number (22928119200).

Almost surely, 2^844391922166 is an apocalyptic number.

844391922166 is a deficient number, since it is larger than the sum of its proper divisors (623007706634).

844391922166 is a wasteful number, since it uses less digits than its factorization.

844391922166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25933.

The product of its digits is 4478976, while the sum is 55.

The spelling of 844391922166 in words is "eight hundred forty-four billion, three hundred ninety-one million, nine hundred twenty-two thousand, one hundred sixty-six".