68288399969 has 2 divisors, whose sum is σ = 68288399970. Its totient is φ = 68288399968.

The previous prime is 68288399953. The next prime is 68288399989. The reversal of 68288399969 is 96999388286.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37137914944 + 31150485025 = 192712^2 + 176495^2 .

It is a cyclic number.

It is not a de Polignac number, because 68288399969 - 2⁴ = 68288399953 is a prime.

It is a super-2 number, since 2×68288399969² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68288399969.

It is not a weakly prime, because it can be changed into another prime (68288399929) 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, 34144199984 + 34144199985.

It is an arithmetic number, because the mean of its divisors is an integer number (34144199985).

Almost surely, 2^68288399969 is an apocalyptic number.

It is an amenable number.

68288399969 is a deficient number, since it is larger than the sum of its proper divisors (1).

68288399969 is an equidigital number, since it uses as much as digits as its factorization.

68288399969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725594112, while the sum is 77.

The spelling of 68288399969 in words is "sixty-eight billion, two hundred eighty-eight million, three hundred ninety-nine thousand, nine hundred sixty-nine".