79085165779 has 2 divisors, whose sum is σ = 79085165780. Its totient is φ = 79085165778.

The previous prime is 79085165771. The next prime is 79085165813. The reversal of 79085165779 is 97756158097.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79085165779 - 2³ = 79085165771 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79085165779.

It is not a weakly prime, because it can be changed into another prime (79085165771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39542582889 + 39542582890.

It is an arithmetic number, because the mean of its divisors is an integer number (39542582890).

Almost surely, 2^79085165779 is an apocalyptic number.

79085165779 is a deficient number, since it is larger than the sum of its proper divisors (1).

79085165779 is an equidigital number, since it uses as much as digits as its factorization.

79085165779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33339600, while the sum is 64.

The spelling of 79085165779 in words is "seventy-nine billion, eighty-five million, one hundred sixty-five thousand, seven hundred seventy-nine".