79899336791 has 12 divisors (see below), whose sum is σ = 83336080320. Its totient is φ = 76524526080.

The previous prime is 79899336767. The next prime is 79899336857. The reversal of 79899336791 is 19763399897.

It is a de Polignac number, because none of the positive numbers 2^k-79899336791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79899536791) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154715 + ... + 428643.

It is an arithmetic number, because the mean of its divisors is an integer number (6944673360).

Almost surely, 2^79899336791 is an apocalyptic number.

79899336791 is a deficient number, since it is larger than the sum of its proper divisors (3436743529).

79899336791 is an equidigital number, since it uses as much as digits as its factorization.

79899336791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274154 (or 274057 counting only the distinct ones).

The product of its digits is 138883248, while the sum is 71.

The spelling of 79899336791 in words is "seventy-nine billion, eight hundred ninety-nine million, three hundred thirty-six thousand, seven hundred ninety-one".