68685237499 has 2 divisors, whose sum is σ = 68685237500. Its totient is φ = 68685237498.

The previous prime is 68685237497. The next prime is 68685237539. The reversal of 68685237499 is 99473258686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68685237499 - 2¹ = 68685237497 is a prime.

Together with 68685237497, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68685237493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34342618749 + 34342618750.

It is an arithmetic number, because the mean of its divisors is an integer number (34342618750).

Almost surely, 2^68685237499 is an apocalyptic number.

68685237499 is a deficient number, since it is larger than the sum of its proper divisors (1).

68685237499 is an equidigital number, since it uses as much as digits as its factorization.

68685237499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 156764160, while the sum is 67.

The spelling of 68685237499 in words is "sixty-eight billion, six hundred eighty-five million, two hundred thirty-seven thousand, four hundred ninety-nine".