68769323809 has 2 divisors, whose sum is σ = 68769323810. Its totient is φ = 68769323808.

The previous prime is 68769323803. The next prime is 68769323851. The reversal of 68769323809 is 90832396786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63433459600 + 5335864209 = 251860^2 + 73047^2 .

It is a cyclic number.

It is not a de Polignac number, because 68769323809 - 2⁹ = 68769323297 is a prime.

It is not a weakly prime, because it can be changed into another prime (68769323803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34384661904 + 34384661905.

It is an arithmetic number, because the mean of its divisors is an integer number (34384661905).

Almost surely, 2^68769323809 is an apocalyptic number.

It is an amenable number.

68769323809 is a deficient number, since it is larger than the sum of its proper divisors (1).

68769323809 is an equidigital number, since it uses as much as digits as its factorization.

68769323809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23514624, while the sum is 61.

The spelling of 68769323809 in words is "sixty-eight billion, seven hundred sixty-nine million, three hundred twenty-three thousand, eight hundred nine".