79655020069 has 2 divisors, whose sum is σ = 79655020070. Its totient is φ = 79655020068.

The previous prime is 79655020051. The next prime is 79655020079. The reversal of 79655020069 is 96002055697.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67667616900 + 11987403169 = 260130^2 + 109487^2 .

It is an emirp because it is prime and its reverse (96002055697) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79655020069 - 2⁹ = 79655019557 is a prime.

It is a super-2 number, since 2×79655020069² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79655020009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39827510034 + 39827510035.

It is an arithmetic number, because the mean of its divisors is an integer number (39827510035).

Almost surely, 2^79655020069 is an apocalyptic number.

It is an amenable number.

79655020069 is a deficient number, since it is larger than the sum of its proper divisors (1).

79655020069 is an equidigital number, since it uses as much as digits as its factorization.

79655020069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1020600, while the sum is 49.

The spelling of 79655020069 in words is "seventy-nine billion, six hundred fifty-five million, twenty thousand, sixty-nine".