865318395917 has 2 divisors, whose sum is σ = 865318395918. Its totient is φ = 865318395916.

The previous prime is 865318395869. The next prime is 865318396001. The reversal of 865318395917 is 719593813568.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 859154732836 + 6163663081 = 926906^2 + 78509^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-865318395917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (865318395017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432659197958 + 432659197959.

It is an arithmetic number, because the mean of its divisors is an integer number (432659197959).

Almost surely, 2^865318395917 is an apocalyptic number.

It is an amenable number.

865318395917 is a deficient number, since it is larger than the sum of its proper divisors (1).

865318395917 is an equidigital number, since it uses as much as digits as its factorization.

865318395917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48988800, while the sum is 65.

The spelling of 865318395917 in words is "eight hundred sixty-five billion, three hundred eighteen million, three hundred ninety-five thousand, nine hundred seventeen".