68209778999 has 2 divisors, whose sum is σ = 68209779000. Its totient is φ = 68209778998.

The previous prime is 68209778993. The next prime is 68209779007. The reversal of 68209778999 is 99987790286.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68209778999 - 2⁸ = 68209778743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68209778993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34104889499 + 34104889500.

It is an arithmetic number, because the mean of its divisors is an integer number (34104889500).

Almost surely, 2^68209778999 is an apocalyptic number.

68209778999 is a deficient number, since it is larger than the sum of its proper divisors (1).

68209778999 is an equidigital number, since it uses as much as digits as its factorization.

68209778999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 246903552, while the sum is 74.

The spelling of 68209778999 in words is "sixty-eight billion, two hundred nine million, seven hundred seventy-eight thousand, nine hundred ninety-nine".