79518607769 has 2 divisors, whose sum is σ = 79518607770. Its totient is φ = 79518607768.

The previous prime is 79518607741. The next prime is 79518607783. The reversal of 79518607769 is 96770681597.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74508799369 + 5009808400 = 272963^2 + 70780^2 .

It is a cyclic number.

It is not a de Polignac number, because 79518607769 - 2²⁰ = 79517559193 is a prime.

It is a super-2 number, since 2×79518607769² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79518604769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39759303884 + 39759303885.

It is an arithmetic number, because the mean of its divisors is an integer number (39759303885).

Almost surely, 2^79518607769 is an apocalyptic number.

It is an amenable number.

79518607769 is a deficient number, since it is larger than the sum of its proper divisors (1).

79518607769 is an equidigital number, since it uses as much as digits as its factorization.

79518607769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40007520, while the sum is 65.

The spelling of 79518607769 in words is "seventy-nine billion, five hundred eighteen million, six hundred seven thousand, seven hundred sixty-nine".