8717855461813 has 2 divisors, whose sum is σ = 8717855461814. Its totient is φ = 8717855461812.

The previous prime is 8717855461681. The next prime is 8717855461817. The reversal of 8717855461813 is 3181645587178.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4564175050449 + 4153680411364 = 2136393^2 + 2038058^2 .

It is a cyclic number.

It is not a de Polignac number, because 8717855461813 - 2¹⁷ = 8717855330741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8717855461817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4358927730906 + 4358927730907.

It is an arithmetic number, because the mean of its divisors is an integer number (4358927730907).

Almost surely, 2^{8717855461813} is an apocalyptic number.

It is an amenable number.

8717855461813 is a deficient number, since it is larger than the sum of its proper divisors (1).

8717855461813 is an equidigital number, since it uses as much as digits as its factorization.

8717855461813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45158400, while the sum is 64.

The spelling of 8717855461813 in words is "eight trillion, seven hundred seventeen billion, eight hundred fifty-five million, four hundred sixty-one thousand, eight hundred thirteen".