68496716609 has 2 divisors, whose sum is σ = 68496716610. Its totient is φ = 68496716608.

The previous prime is 68496716579. The next prime is 68496716627. The reversal of 68496716609 is 90661769486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63150182209 + 5346534400 = 251297^2 + 73120^2 .

It is a cyclic number.

It is not a de Polignac number, because 68496716609 - 2¹² = 68496712513 is a prime.

It is not a weakly prime, because it can be changed into another prime (68496716689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34248358304 + 34248358305.

It is an arithmetic number, because the mean of its divisors is an integer number (34248358305).

Almost surely, 2^68496716609 is an apocalyptic number.

It is an amenable number.

68496716609 is a deficient number, since it is larger than the sum of its proper divisors (1).

68496716609 is an equidigital number, since it uses as much as digits as its factorization.

68496716609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23514624, while the sum is 62.

The spelling of 68496716609 in words is "sixty-eight billion, four hundred ninety-six million, seven hundred sixteen thousand, six hundred nine".