79975309771 has 12 divisors (see below), whose sum is σ = 93266864688. Its totient is φ = 68377578192.

The previous prime is 79975309769. The next prime is 79975309781. The reversal of 79975309771 is 17790357997.

It is not a de Polignac number, because 79975309771 - 2¹ = 79975309769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79975309741) 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, 2036151 + ... + 2075056.

It is an arithmetic number, because the mean of its divisors is an integer number (7772238724).

Almost surely, 2^79975309771 is an apocalyptic number.

79975309771 is a deficient number, since it is larger than the sum of its proper divisors (13291554917).

79975309771 is a wasteful number, since it uses less digits than its factorization.

79975309771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4111618 (or 4111611 counting only the distinct ones).

The product of its (nonzero) digits is 26254935, while the sum is 64.

The spelling of 79975309771 in words is "seventy-nine billion, nine hundred seventy-five million, three hundred nine thousand, seven hundred seventy-one".