68754821489 has 2 divisors, whose sum is σ = 68754821490. Its totient is φ = 68754821488.

The previous prime is 68754821479. The next prime is 68754821497. The reversal of 68754821489 is 98412845786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60008831089 + 8745990400 = 244967^2 + 93520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68754821489 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (68754821479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34377410744 + 34377410745.

It is an arithmetic number, because the mean of its divisors is an integer number (34377410745).

Almost surely, 2^68754821489 is an apocalyptic number.

It is an amenable number.

68754821489 is a deficient number, since it is larger than the sum of its proper divisors (1).

68754821489 is an equidigital number, since it uses as much as digits as its factorization.

68754821489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30965760, while the sum is 62.

The spelling of 68754821489 in words is "sixty-eight billion, seven hundred fifty-four million, eight hundred twenty-one thousand, four hundred eighty-nine".