79065856081 has 2 divisors, whose sum is σ = 79065856082. Its totient is φ = 79065856080.

The previous prime is 79065856061. The next prime is 79065856109. The reversal of 79065856081 is 18065856097.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44863052481 + 34202803600 = 211809^2 + 184940^2 .

It is a cyclic number.

It is not a de Polignac number, because 79065856081 - 2²⁷ = 78931638353 is a prime.

It is a super-2 number, since 2×79065856081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79065856061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39532928040 + 39532928041.

It is an arithmetic number, because the mean of its divisors is an integer number (39532928041).

Almost surely, 2^79065856081 is an apocalyptic number.

It is an amenable number.

79065856081 is a deficient number, since it is larger than the sum of its proper divisors (1).

79065856081 is an equidigital number, since it uses as much as digits as its factorization.

79065856081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3628800, while the sum is 55.

The spelling of 79065856081 in words is "seventy-nine billion, sixty-five million, eight hundred fifty-six thousand, eighty-one".