79515314719 has 4 divisors (see below), whose sum is σ = 79532335296. Its totient is φ = 79498294144.

The previous prime is 79515314699. The next prime is 79515314789. The reversal of 79515314719 is 91741351597.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79515314719 - 2³⁵ = 45155576351 is a prime.

It is a super-2 number, since 2×79515314719² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79515314789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8503279 + ... + 8512624.

It is an arithmetic number, because the mean of its divisors is an integer number (19883083824).

Almost surely, 2^79515314719 is an apocalyptic number.

79515314719 is a deficient number, since it is larger than the sum of its proper divisors (17020577).

79515314719 is a wasteful number, since it uses less digits than its factorization.

79515314719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17020576.

The product of its digits is 1190700, while the sum is 52.

The spelling of 79515314719 in words is "seventy-nine billion, five hundred fifteen million, three hundred fourteen thousand, seven hundred nineteen".