80991104814 has 12 divisors (see below), whose sum is σ = 175480727136. Its totient is φ = 26997034932.

The previous prime is 80991104767. The next prime is 80991104837. The reversal of 80991104814 is 41840119908.

80991104814 is a `hidden beast` number, since 80 + 9 + 91 + 1 + 0 + 481 + 4 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 80991104814.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2249752894 + ... + 2249752929.

It is an arithmetic number, because the mean of its divisors is an integer number (14623393928).

Almost surely, 2^80991104814 is an apocalyptic number.

80991104814 is an abundant number, since it is smaller than the sum of its proper divisors (94489622322).

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

80991104814 is a wasteful number, since it uses less digits than its factorization.

80991104814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4499505831 (or 4499505828 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The spelling of 80991104814 in words is "eighty billion, nine hundred ninety-one million, one hundred four thousand, eight hundred fourteen".