68281243579 has 2 divisors, whose sum is σ = 68281243580. Its totient is φ = 68281243578.

The previous prime is 68281243561. The next prime is 68281243621. The reversal of 68281243579 is 97534218286.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68281243579 - 2²¹ = 68279146427 is a prime.

It is not a weakly prime, because it can be changed into another prime (68281643579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34140621789 + 34140621790.

It is an arithmetic number, because the mean of its divisors is an integer number (34140621790).

Almost surely, 2^68281243579 is an apocalyptic number.

68281243579 is a deficient number, since it is larger than the sum of its proper divisors (1).

68281243579 is an equidigital number, since it uses as much as digits as its factorization.

68281243579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5806080, while the sum is 55.

The spelling of 68281243579 in words is "sixty-eight billion, two hundred eighty-one million, two hundred forty-three thousand, five hundred seventy-nine".