79724774717 has 16 divisors (see below), whose sum is σ = 94485111552. Its totient is φ = 65843072640.

The previous prime is 79724774699. The next prime is 79724774743. The reversal of 79724774717 is 71747742797.

It is a cyclic number.

It is not a de Polignac number, because 79724774717 - 2²² = 79720580413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79724774717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79724774797) 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, 1467584 + ... + 1520937.

It is an arithmetic number, because the mean of its divisors is an integer number (5905319472).

Almost surely, 2^79724774717 is an apocalyptic number.

It is an amenable number.

79724774717 is a deficient number, since it is larger than the sum of its proper divisors (14760336835).

79724774717 is a wasteful number, since it uses less digits than its factorization.

79724774717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2988668.

The product of its digits is 33882912, while the sum is 62.

The spelling of 79724774717 in words is "seventy-nine billion, seven hundred twenty-four million, seven hundred seventy-four thousand, seven hundred seventeen".