79722160817 has 16 divisors (see below), whose sum is σ = 89021657088. Its totient is φ = 70896392640.

The previous prime is 79722160811. The next prime is 79722160823. The reversal of 79722160817 is 71806122797.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (79722160811) and next prime (79722160823).

It is a cyclic number.

It is not a de Polignac number, because 79722160817 - 2⁴ = 79722160801 is a prime.

It is a super-2 number, since 2×79722160817² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (79722160811) 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, 353678 + ... + 533415.

It is an arithmetic number, because the mean of its divisors is an integer number (5563853568).

Almost surely, 2^79722160817 is an apocalyptic number.

It is an amenable number.

79722160817 is a deficient number, since it is larger than the sum of its proper divisors (9299496271).

79722160817 is a wasteful number, since it uses less digits than its factorization.

79722160817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887360.

The product of its (nonzero) digits is 592704, while the sum is 50.

The spelling of 79722160817 in words is "seventy-nine billion, seven hundred twenty-two million, one hundred sixty thousand, eight hundred seventeen".