79680208157 has 6 divisors (see below), whose sum is σ = 87582377694. Its totient is φ = 72436552760.

The previous prime is 79680208147. The next prime is 79680208169. The reversal of 79680208157 is 75180208697.

It can be written as a sum of positive squares in only one way, i.e., 69081711556 + 10598496601 = 262834^2 + 102949^2 .

It is not a de Polignac number, because 79680208157 - 2⁴ = 79680208141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79680208099 and 79680208108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79680208147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 329256938 + ... + 329257179.

It is an arithmetic number, because the mean of its divisors is an integer number (14597062949).

Almost surely, 2^79680208157 is an apocalyptic number.

It is an amenable number.

79680208157 is a deficient number, since it is larger than the sum of its proper divisors (7902169537).

79680208157 is a wasteful number, since it uses less digits than its factorization.

79680208157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658514139 (or 658514128 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 53.

The spelling of 79680208157 in words is "seventy-nine billion, six hundred eighty million, two hundred eight thousand, one hundred fifty-seven".