68745186539 has 2 divisors, whose sum is σ = 68745186540. Its totient is φ = 68745186538.

The previous prime is 68745186533. The next prime is 68745186557. The reversal of 68745186539 is 93568154786.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68745186539 is a prime.

It is not a weakly prime, because it can be changed into another prime (68745186533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34372593269 + 34372593270.

It is an arithmetic number, because the mean of its divisors is an integer number (34372593270).

Almost surely, 2^68745186539 is an apocalyptic number.

68745186539 is a deficient number, since it is larger than the sum of its proper divisors (1).

68745186539 is an equidigital number, since it uses as much as digits as its factorization.

68745186539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43545600, while the sum is 62.

The spelling of 68745186539 in words is "sixty-eight billion, seven hundred forty-five million, one hundred eighty-six thousand, five hundred thirty-nine".