79159510657 has 2 divisors, whose sum is σ = 79159510658. Its totient is φ = 79159510656.

The previous prime is 79159510601. The next prime is 79159510667. The reversal of 79159510657 is 75601595197.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49454643456 + 29704867201 = 222384^2 + 172351^2 .

It is a cyclic number.

It is not a de Polignac number, because 79159510657 - 2²³ = 79151122049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79159510598 and 79159510607.

It is not a weakly prime, because it can be changed into another prime (79159510667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39579755328 + 39579755329.

It is an arithmetic number, because the mean of its divisors is an integer number (39579755329).

Almost surely, 2^79159510657 is an apocalyptic number.

It is an amenable number.

79159510657 is a deficient number, since it is larger than the sum of its proper divisors (1).

79159510657 is an equidigital number, since it uses as much as digits as its factorization.

79159510657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2976750, while the sum is 55.

The spelling of 79159510657 in words is "seventy-nine billion, one hundred fifty-nine million, five hundred ten thousand, six hundred fifty-seven".