68985886709 has 2 divisors, whose sum is σ = 68985886710. Its totient is φ = 68985886708.

The previous prime is 68985886693. The next prime is 68985886741. The reversal of 68985886709 is 90768858986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68345644900 + 640241809 = 261430^2 + 25303^2 .

It is a cyclic number.

It is not a de Polignac number, because 68985886709 - 2⁴ = 68985886693 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68985886769) 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, 34492943354 + 34492943355.

It is an arithmetic number, because the mean of its divisors is an integer number (34492943355).

Almost surely, 2^68985886709 is an apocalyptic number.

It is an amenable number.

68985886709 is a deficient number, since it is larger than the sum of its proper divisors (1).

68985886709 is an equidigital number, since it uses as much as digits as its factorization.

68985886709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 418037760, while the sum is 74.

The spelling of 68985886709 in words is "sixty-eight billion, nine hundred eighty-five million, eight hundred eighty-six thousand, seven hundred nine".