68337782993 has 2 divisors, whose sum is σ = 68337782994. Its totient is φ = 68337782992.

The previous prime is 68337782987. The next prime is 68337783109. The reversal of 68337782993 is 39928773386.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57258746944 + 11079036049 = 239288^2 + 105257^2 .

It is a cyclic number.

It is not a de Polignac number, because 68337782993 - 2³⁴ = 51157913809 is a prime.

It is not a weakly prime, because it can be changed into another prime (68337787993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34168891496 + 34168891497.

It is an arithmetic number, because the mean of its divisors is an integer number (34168891497).

Almost surely, 2^68337782993 is an apocalyptic number.

It is an amenable number.

68337782993 is a deficient number, since it is larger than the sum of its proper divisors (1).

68337782993 is an equidigital number, since it uses as much as digits as its factorization.

68337782993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82301184, while the sum is 65.

The spelling of 68337782993 in words is "sixty-eight billion, three hundred thirty-seven million, seven hundred eighty-two thousand, nine hundred ninety-three".