79715628161 has 4 divisors (see below), whose sum is σ = 85847599572. Its totient is φ = 73583656752.

The previous prime is 79715628151. The next prime is 79715628173. The reversal of 79715628161 is 16182651797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16182651797 = 13 ⋅1244819369.

It can be written as a sum of positive squares in 2 ways, for example, as 42178890625 + 37536737536 = 205375^2 + 193744^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79715628161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79715628151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3065985686 + ... + 3065985711.

It is an arithmetic number, because the mean of its divisors is an integer number (21461899893).

Almost surely, 2^79715628161 is an apocalyptic number.

It is an amenable number.

79715628161 is a deficient number, since it is larger than the sum of its proper divisors (6131971411).

79715628161 is a wasteful number, since it uses less digits than its factorization.

79715628161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6131971410.

The product of its digits is 1270080, while the sum is 53.

The spelling of 79715628161 in words is "seventy-nine billion, seven hundred fifteen million, six hundred twenty-eight thousand, one hundred sixty-one".