68218916747 has 2 divisors, whose sum is σ = 68218916748. Its totient is φ = 68218916746.

The previous prime is 68218916699. The next prime is 68218916797. The reversal of 68218916747 is 74761981286.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68218916747 is a prime.

It is not a weakly prime, because it can be changed into another prime (68218916797) 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, 34109458373 + 34109458374.

It is an arithmetic number, because the mean of its divisors is an integer number (34109458374).

Almost surely, 2^68218916747 is an apocalyptic number.

68218916747 is a deficient number, since it is larger than the sum of its proper divisors (1).

68218916747 is an equidigital number, since it uses as much as digits as its factorization.

68218916747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8128512, while the sum is 59.

The spelling of 68218916747 in words is "sixty-eight billion, two hundred eighteen million, nine hundred sixteen thousand, seven hundred forty-seven".