80779437165 has 16 divisors (see below), whose sum is σ = 147710971008. Its totient is φ = 36927742656.

The previous prime is 80779437139. The next prime is 80779437169. The reversal of 80779437165 is 56173497708.

It is a happy number.

It is not a de Polignac number, because 80779437165 - 2⁹ = 80779436653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80779437169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 384663882 + ... + 384664091.

It is an arithmetic number, because the mean of its divisors is an integer number (9231935688).

Almost surely, 2^80779437165 is an apocalyptic number.

It is an amenable number.

80779437165 is a deficient number, since it is larger than the sum of its proper divisors (66931533843).

80779437165 is a wasteful number, since it uses less digits than its factorization.

80779437165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769327988.

The product of its (nonzero) digits is 8890560, while the sum is 57.

The spelling of 80779437165 in words is "eighty billion, seven hundred seventy-nine million, four hundred thirty-seven thousand, one hundred sixty-five".