79021117086719 has 2 divisors, whose sum is σ = 79021117086720. Its totient is φ = 79021117086718.

The previous prime is 79021117086707. The next prime is 79021117086739. The reversal of 79021117086719 is 91768071112097.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79021117086719 - 2⁸ = 79021117086463 is a prime.

It is a super-2 number, since 2×79021117086719² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79021117086739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39510558543359 + 39510558543360.

It is an arithmetic number, because the mean of its divisors is an integer number (39510558543360).

Almost surely, 2^{79021117086719} is an apocalyptic number.

79021117086719 is a deficient number, since it is larger than the sum of its proper divisors (1).

79021117086719 is an equidigital number, since it uses as much as digits as its factorization.

79021117086719 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2667168, while the sum is 59.

The spelling of 79021117086719 in words is "seventy-nine trillion, twenty-one billion, one hundred seventeen million, eighty-six thousand, seven hundred nineteen".