68130071689 has 2 divisors, whose sum is σ = 68130071690. Its totient is φ = 68130071688.

The previous prime is 68130071629. The next prime is 68130071773. The reversal of 68130071689 is 98617003186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64221696400 + 3908375289 = 253420^2 + 62517^2 .

It is a cyclic number.

It is not a de Polignac number, because 68130071689 - 2¹⁷ = 68129940617 is a prime.

It is not a weakly prime, because it can be changed into another prime (68130071629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34065035844 + 34065035845.

It is an arithmetic number, because the mean of its divisors is an integer number (34065035845).

Almost surely, 2^68130071689 is an apocalyptic number.

It is an amenable number.

68130071689 is a deficient number, since it is larger than the sum of its proper divisors (1).

68130071689 is an equidigital number, since it uses as much as digits as its factorization.

68130071689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 49.

The spelling of 68130071689 in words is "sixty-eight billion, one hundred thirty million, seventy-one thousand, six hundred eighty-nine".