68143375913 has 2 divisors, whose sum is σ = 68143375914. Its totient is φ = 68143375912.

The previous prime is 68143375843. The next prime is 68143375973. The reversal of 68143375913 is 31957334186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65192387584 + 2950988329 = 255328^2 + 54323^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68143375913 is a prime.

It is not a weakly prime, because it can be changed into another prime (68143375973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34071687956 + 34071687957.

It is an arithmetic number, because the mean of its divisors is an integer number (34071687957).

Almost surely, 2^68143375913 is an apocalyptic number.

It is an amenable number.

68143375913 is a deficient number, since it is larger than the sum of its proper divisors (1).

68143375913 is an equidigital number, since it uses as much as digits as its factorization.

68143375913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 50.

The spelling of 68143375913 in words is "sixty-eight billion, one hundred forty-three million, three hundred seventy-five thousand, nine hundred thirteen".