79009440677 has 2 divisors, whose sum is σ = 79009440678. Its totient is φ = 79009440676.

The previous prime is 79009440649. The next prime is 79009440701. The reversal of 79009440677 is 77604490097.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61031726116 + 17977714561 = 247046^2 + 134081^2 .

It is a cyclic number.

It is not a de Polignac number, because 79009440677 - 2²⁶ = 78942331813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79009443677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39504720338 + 39504720339.

It is an arithmetic number, because the mean of its divisors is an integer number (39504720339).

Almost surely, 2^79009440677 is an apocalyptic number.

It is an amenable number.

79009440677 is a deficient number, since it is larger than the sum of its proper divisors (1).

79009440677 is an equidigital number, since it uses as much as digits as its factorization.

79009440677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2667168, while the sum is 53.

The spelling of 79009440677 in words is "seventy-nine billion, nine million, four hundred forty thousand, six hundred seventy-seven".