68317881679 has 2 divisors, whose sum is σ = 68317881680. Its totient is φ = 68317881678.

The previous prime is 68317881641. The next prime is 68317881701. The reversal of 68317881679 is 97618871386.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68317881679 - 2²⁹ = 67781010767 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68317881679.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68317881179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34158940839 + 34158940840.

It is an arithmetic number, because the mean of its divisors is an integer number (34158940840).

Almost surely, 2^68317881679 is an apocalyptic number.

68317881679 is a deficient number, since it is larger than the sum of its proper divisors (1).

68317881679 is an equidigital number, since it uses as much as digits as its factorization.

68317881679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24385536, while the sum is 64.

The spelling of 68317881679 in words is "sixty-eight billion, three hundred seventeen million, eight hundred eighty-one thousand, six hundred seventy-nine".