317916763781 has 2 divisors, whose sum is σ = 317916763782. Its totient is φ = 317916763780.

The previous prime is 317916763711. The next prime is 317916763799. The reversal of 317916763781 is 187367619713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 256491602500 + 61425161281 = 506450^2 + 247841^2 .

It is a cyclic number.

It is not a de Polignac number, because 317916763781 - 2²⁶ = 317849654917 is a prime.

It is a super-2 number, since 2×317916763781² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 317916763781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317916763711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158958381890 + 158958381891.

It is an arithmetic number, because the mean of its divisors is an integer number (158958381891).

Almost surely, 2^317916763781 is an apocalyptic number.

It is an amenable number.

317916763781 is a deficient number, since it is larger than the sum of its proper divisors (1).

317916763781 is an equidigital number, since it uses as much as digits as its factorization.

317916763781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8001504, while the sum is 59.

The spelling of 317916763781 in words is "three hundred seventeen billion, nine hundred sixteen million, seven hundred sixty-three thousand, seven hundred eighty-one".