791577269257 has 2 divisors, whose sum is σ = 791577269258. Its totient is φ = 791577269256.

The previous prime is 791577269237. The next prime is 791577269261. The reversal of 791577269257 is 752962775197.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 601052876176 + 190524393081 = 775276^2 + 436491^2 .

It is an emirp because it is prime and its reverse (752962775197) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-791577269257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 791577269192 and 791577269201.

It is not a weakly prime, because it can be changed into another prime (791577269237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 395788634628 + 395788634629.

It is an arithmetic number, because the mean of its divisors is an integer number (395788634629).

Almost surely, 2^791577269257 is an apocalyptic number.

It is an amenable number.

791577269257 is a deficient number, since it is larger than the sum of its proper divisors (1).

791577269257 is an equidigital number, since it uses as much as digits as its factorization.

791577269257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116688600, while the sum is 67.

The spelling of 791577269257 in words is "seven hundred ninety-one billion, five hundred seventy-seven million, two hundred sixty-nine thousand, two hundred fifty-seven".