79162775449 has 2 divisors, whose sum is σ = 79162775450. Its totient is φ = 79162775448.

The previous prime is 79162775407. The next prime is 79162775459. The reversal of 79162775449 is 94457726197.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46351075849 + 32811699600 = 215293^2 + 181140^2 .

It is a cyclic number.

It is not a de Polignac number, because 79162775449 - 2⁹ = 79162774937 is a prime.

It is not a weakly prime, because it can be changed into another prime (79162775459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39581387724 + 39581387725.

It is an arithmetic number, because the mean of its divisors is an integer number (39581387725).

Almost surely, 2^79162775449 is an apocalyptic number.

It is an amenable number.

79162775449 is a deficient number, since it is larger than the sum of its proper divisors (1).

79162775449 is an equidigital number, since it uses as much as digits as its factorization.

79162775449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26671680, while the sum is 61.

The spelling of 79162775449 in words is "seventy-nine billion, one hundred sixty-two million, seven hundred seventy-five thousand, four hundred forty-nine".