717891552017 has 2 divisors, whose sum is σ = 717891552018. Its totient is φ = 717891552016.

The previous prime is 717891551989. The next prime is 717891552041. The reversal of 717891552017 is 710255198717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 525507556561 + 192383995456 = 724919^2 + 438616^2 .

It is a cyclic number.

It is not a de Polignac number, because 717891552017 - 2⁸ = 717891551761 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 717891552017.

It is not a weakly prime, because it can be changed into another prime (717891552617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 358945776008 + 358945776009.

It is an arithmetic number, because the mean of its divisors is an integer number (358945776009).

Almost surely, 2^717891552017 is an apocalyptic number.

It is an amenable number.

717891552017 is a deficient number, since it is larger than the sum of its proper divisors (1).

717891552017 is an equidigital number, since it uses as much as digits as its factorization.

717891552017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1234800, while the sum is 53.

The spelling of 717891552017 in words is "seven hundred seventeen billion, eight hundred ninety-one million, five hundred fifty-two thousand, seventeen".