68812568779 has 2 divisors, whose sum is σ = 68812568780. Its totient is φ = 68812568778.

The previous prime is 68812568753. The next prime is 68812568819. The reversal of 68812568779 is 97786521886.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68812568779 - 2¹⁵ = 68812536011 is a prime.

It is not a weakly prime, because it can be changed into another prime (68812560779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34406284389 + 34406284390.

It is an arithmetic number, because the mean of its divisors is an integer number (34406284390).

Almost surely, 2^68812568779 is an apocalyptic number.

68812568779 is a deficient number, since it is larger than the sum of its proper divisors (1).

68812568779 is an equidigital number, since it uses as much as digits as its factorization.

68812568779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81285120, while the sum is 67.

The spelling of 68812568779 in words is "sixty-eight billion, eight hundred twelve million, five hundred sixty-eight thousand, seven hundred seventy-nine".