17317158745849 has 2 divisors, whose sum is σ = 17317158745850. Its totient is φ = 17317158745848.

The previous prime is 17317158745819. The next prime is 17317158745867. The reversal of 17317158745849 is 94854785171371.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11294257440249 + 6022901305600 = 3360693^2 + 2454160^2 .

It is a cyclic number.

It is not a de Polignac number, because 17317158745849 - 2²¹ = 17317156648697 is a prime.

It is not a weakly prime, because it can be changed into another prime (17317158745819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8658579372924 + 8658579372925.

It is an arithmetic number, because the mean of its divisors is an integer number (8658579372925).

Almost surely, 2^{17317158745849} is an apocalyptic number.

It is an amenable number.

17317158745849 is a deficient number, since it is larger than the sum of its proper divisors (1).

17317158745849 is an equidigital number, since it uses as much as digits as its factorization.

17317158745849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 237081600, while the sum is 70.

The spelling of 17317158745849 in words is "seventeen trillion, three hundred seventeen billion, one hundred fifty-eight million, seven hundred forty-five thousand, eight hundred forty-nine".