79011635257 has 2 divisors, whose sum is σ = 79011635258. Its totient is φ = 79011635256.

The previous prime is 79011635251. The next prime is 79011635273. The reversal of 79011635257 is 75253611097.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60616409616 + 18395225641 = 246204^2 + 135629^2 .

It is a cyclic number.

It is not a de Polignac number, because 79011635257 - 2¹⁵ = 79011602489 is a prime.

It is not a weakly prime, because it can be changed into another prime (79011635251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39505817628 + 39505817629.

It is an arithmetic number, because the mean of its divisors is an integer number (39505817629).

Almost surely, 2^79011635257 is an apocalyptic number.

It is an amenable number.

79011635257 is a deficient number, since it is larger than the sum of its proper divisors (1).

79011635257 is an equidigital number, since it uses as much as digits as its factorization.

79011635257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 396900, while the sum is 46.

The spelling of 79011635257 in words is "seventy-nine billion, eleven million, six hundred thirty-five thousand, two hundred fifty-seven".