68919159389 has 2 divisors, whose sum is σ = 68919159390. Its totient is φ = 68919159388.

The previous prime is 68919159377. The next prime is 68919159403. The reversal of 68919159389 is 98395191986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66212038489 + 2707120900 = 257317^2 + 52030^2 .

It is a cyclic number.

It is not a de Polignac number, because 68919159389 - 2³⁶ = 199682653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68919159319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34459579694 + 34459579695.

It is an arithmetic number, because the mean of its divisors is an integer number (34459579695).

Almost surely, 2^68919159389 is an apocalyptic number.

It is an amenable number.

68919159389 is a deficient number, since it is larger than the sum of its proper divisors (1).

68919159389 is an equidigital number, since it uses as much as digits as its factorization.

68919159389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37791360, while the sum is 68.

The spelling of 68919159389 in words is "sixty-eight billion, nine hundred nineteen million, one hundred fifty-nine thousand, three hundred eighty-nine".