79880444691 has 16 divisors (see below), whose sum is σ = 108028581504. Its totient is φ = 52493811264.

The previous prime is 79880444687. The next prime is 79880444701. The reversal of 79880444691 is 19644408897.

It is not a de Polignac number, because 79880444691 - 2² = 79880444687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79880444621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 278200 + ... + 486986.

It is an arithmetic number, because the mean of its divisors is an integer number (6751786344).

Almost surely, 2^79880444691 is an apocalyptic number.

79880444691 is a deficient number, since it is larger than the sum of its proper divisors (28148136813).

79880444691 is a wasteful number, since it uses less digits than its factorization.

79880444691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210610.

The product of its (nonzero) digits is 13934592, while the sum is 60.

The spelling of 79880444691 in words is "seventy-nine billion, eight hundred eighty million, four hundred forty-four thousand, six hundred ninety-one".