68459261869 has 2 divisors, whose sum is σ = 68459261870. Its totient is φ = 68459261868.

The previous prime is 68459261867. The next prime is 68459261903. The reversal of 68459261869 is 96816295486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55725267844 + 12733994025 = 236062^2 + 112845^2 .

It is a cyclic number.

It is not a de Polignac number, because 68459261869 - 2¹ = 68459261867 is a prime.

It is a super-2 number, since 2×68459261869² (a number of 22 digits) contains 22 as substring.

Together with 68459261867, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 68459261869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68459261861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34229630934 + 34229630935.

It is an arithmetic number, because the mean of its divisors is an integer number (34229630935).

Almost surely, 2^68459261869 is an apocalyptic number.

It is an amenable number.

68459261869 is a deficient number, since it is larger than the sum of its proper divisors (1).

68459261869 is an equidigital number, since it uses as much as digits as its factorization.

68459261869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44789760, while the sum is 64.

The spelling of 68459261869 in words is "sixty-eight billion, four hundred fifty-nine million, two hundred sixty-one thousand, eight hundred sixty-nine".