79429166817 has 32 divisors (see below), whose sum is σ = 142194877440. Its totient is φ = 38087910720.

The previous prime is 79429166801. The next prime is 79429166821. The reversal of 79429166817 is 71866192497.

It is not a de Polignac number, because 79429166817 - 2⁴ = 79429166801 is a prime.

It is a super-2 number, since 2×79429166817² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79429166837) 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, 13221967 + ... + 13227972.

It is an arithmetic number, because the mean of its divisors is an integer number (4443589920).

Almost surely, 2^79429166817 is an apocalyptic number.

79429166817 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

79429166817 is a deficient number, since it is larger than the sum of its proper divisors (62765710623).

79429166817 is a wasteful number, since it uses less digits than its factorization.

79429166817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26449973.

The product of its digits is 9144576, while the sum is 60.

The spelling of 79429166817 in words is "seventy-nine billion, four hundred twenty-nine million, one hundred sixty-six thousand, eight hundred seventeen".