791657298877 has 2 divisors, whose sum is σ = 791657298878. Its totient is φ = 791657298876.

The previous prime is 791657298823. The next prime is 791657298911. The reversal of 791657298877 is 778892756197.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 450524206521 + 341133092356 = 671211^2 + 584066^2 .

It is an emirp because it is prime and its reverse (778892756197) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-791657298877 is a prime.

It is a super-2 number, since 2×791657298877² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (791657298277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 395828649438 + 395828649439.

It is an arithmetic number, because the mean of its divisors is an integer number (395828649439).

Almost surely, 2^791657298877 is an apocalyptic number.

It is an amenable number.

791657298877 is a deficient number, since it is larger than the sum of its proper divisors (1).

791657298877 is an equidigital number, since it uses as much as digits as its factorization.

791657298877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746807040, while the sum is 76.

The spelling of 791657298877 in words is "seven hundred ninety-one billion, six hundred fifty-seven million, two hundred ninety-eight thousand, eight hundred seventy-seven".