79085165813 has 2 divisors, whose sum is σ = 79085165814. Its totient is φ = 79085165812.

The previous prime is 79085165779. The next prime is 79085165839. The reversal of 79085165813 is 31856158097.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70096798564 + 8988367249 = 264758^2 + 94807^2 .

It is a cyclic number.

It is not a de Polignac number, because 79085165813 - 2¹² = 79085161717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79085165113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39542582906 + 39542582907.

It is an arithmetic number, because the mean of its divisors is an integer number (39542582907).

Almost surely, 2^79085165813 is an apocalyptic number.

It is an amenable number.

79085165813 is a deficient number, since it is larger than the sum of its proper divisors (1).

79085165813 is an equidigital number, since it uses as much as digits as its factorization.

79085165813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1814400, while the sum is 53.

The spelling of 79085165813 in words is "seventy-nine billion, eighty-five million, one hundred sixty-five thousand, eight hundred thirteen".