79969891353 has 32 divisors (see below), whose sum is σ = 117467331072. Its totient is φ = 48389671440.

The previous prime is 79969891343. The next prime is 79969891357. The reversal of 79969891353 is 35319896997.

It is not a de Polignac number, because 79969891353 - 2⁵ = 79969891321 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79969891357) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2551926 + ... + 2583072.

It is an arithmetic number, because the mean of its divisors is an integer number (3670854096).

Almost surely, 2^79969891353 is an apocalyptic number.

It is an amenable number.

79969891353 is a deficient number, since it is larger than the sum of its proper divisors (37497439719).

79969891353 is a wasteful number, since it uses less digits than its factorization.

79969891353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31826 (or 31804 counting only the distinct ones).

The product of its digits is 99202320, while the sum is 69.

The spelling of 79969891353 in words is "seventy-nine billion, nine hundred sixty-nine million, eight hundred ninety-one thousand, three hundred fifty-three".