79536464489 has 2 divisors, whose sum is σ = 79536464490. Its totient is φ = 79536464488.

The previous prime is 79536464461. The next prime is 79536464521. The reversal of 79536464489 is 98446463597.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77511014464 + 2025450025 = 278408^2 + 45005^2 .

It is a cyclic number.

It is not a de Polignac number, because 79536464489 - 2²⁸ = 79268029033 is a prime.

It is a super-2 number, since 2×79536464489² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79536464429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39768232244 + 39768232245.

It is an arithmetic number, because the mean of its divisors is an integer number (39768232245).

Almost surely, 2^79536464489 is an apocalyptic number.

It is an amenable number.

79536464489 is a deficient number, since it is larger than the sum of its proper divisors (1).

79536464489 is an equidigital number, since it uses as much as digits as its factorization.

79536464489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 156764160, while the sum is 65.

The spelling of 79536464489 in words is "seventy-nine billion, five hundred thirty-six million, four hundred sixty-four thousand, four hundred eighty-nine".