68288399989 has 2 divisors, whose sum is σ = 68288399990. Its totient is φ = 68288399988.

The previous prime is 68288399969. The next prime is 68288400001. The reversal of 68288399989 is 98999388286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44312355025 + 23976044964 = 210505^2 + 154842^2 .

It is a cyclic number.

It is not a de Polignac number, because 68288399989 - 2²⁹ = 67751529077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68288399929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34144199994 + 34144199995.

It is an arithmetic number, because the mean of its divisors is an integer number (34144199995).

Almost surely, 2^68288399989 is an apocalyptic number.

It is an amenable number.

68288399989 is a deficient number, since it is larger than the sum of its proper divisors (1).

68288399989 is an equidigital number, since it uses as much as digits as its factorization.

68288399989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967458816, while the sum is 79.

The spelling of 68288399989 in words is "sixty-eight billion, two hundred eighty-eight million, three hundred ninety-nine thousand, nine hundred eighty-nine".