68243600017 has 2 divisors, whose sum is σ = 68243600018. Its totient is φ = 68243600016.

The previous prime is 68243600011. The next prime is 68243600039. The reversal of 68243600017 is 71000634286.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42336766081 + 25906833936 = 205759^2 + 160956^2 .

It is a cyclic number.

It is not a de Polignac number, because 68243600017 - 2³¹ = 66096116369 is a prime.

It is not a weakly prime, because it can be changed into another prime (68243600011) 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, 34121800008 + 34121800009.

It is an arithmetic number, because the mean of its divisors is an integer number (34121800009).

Almost surely, 2^68243600017 is an apocalyptic number.

It is an amenable number.

68243600017 is a deficient number, since it is larger than the sum of its proper divisors (1).

68243600017 is an equidigital number, since it uses as much as digits as its factorization.

68243600017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 68243600017 in words is "sixty-eight billion, two hundred forty-three million, six hundred thousand, seventeen".