68422035809 has 2 divisors, whose sum is σ = 68422035810. Its totient is φ = 68422035808.

The previous prime is 68422035751. The next prime is 68422035817. The reversal of 68422035809 is 90853022486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41428531600 + 26993504209 = 203540^2 + 164297^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68422035809 is a prime.

It is not a weakly prime, because it can be changed into another prime (68422035509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34211017904 + 34211017905.

It is an arithmetic number, because the mean of its divisors is an integer number (34211017905).

Almost surely, 2^68422035809 is an apocalyptic number.

It is an amenable number.

68422035809 is a deficient number, since it is larger than the sum of its proper divisors (1).

68422035809 is an equidigital number, since it uses as much as digits as its factorization.

68422035809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 68422035809 in words is "sixty-eight billion, four hundred twenty-two million, thirty-five thousand, eight hundred nine".