68284957817 has 2 divisors, whose sum is σ = 68284957818. Its totient is φ = 68284957816.

The previous prime is 68284957751. The next prime is 68284957861. The reversal of 68284957817 is 71875948286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66727155856 + 1557801961 = 258316^2 + 39469^2 .

It is a cyclic number.

It is not a de Polignac number, because 68284957817 - 2¹⁴ = 68284941433 is a prime.

It is not a weakly prime, because it can be changed into another prime (68284957877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34142478908 + 34142478909.

It is an arithmetic number, because the mean of its divisors is an integer number (34142478909).

Almost surely, 2^68284957817 is an apocalyptic number.

It is an amenable number.

68284957817 is a deficient number, since it is larger than the sum of its proper divisors (1).

68284957817 is an equidigital number, since it uses as much as digits as its factorization.

68284957817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54190080, while the sum is 65.

The spelling of 68284957817 in words is "sixty-eight billion, two hundred eighty-four million, nine hundred fifty-seven thousand, eight hundred seventeen".