846868868689 has 2 divisors, whose sum is σ = 846868868690. Its totient is φ = 846868868688.

The previous prime is 846868868609. The next prime is 846868868723. The reversal of 846868868689 is 986868868648.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 697859744400 + 149009124289 = 835380^2 + 386017^2 .

It is a cyclic number.

It is not a de Polignac number, because 846868868689 - 2²⁷ = 846734650961 is a prime.

It is not a weakly prime, because it can be changed into another prime (846868868609) 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, 423434434344 + 423434434345.

It is an arithmetic number, because the mean of its divisors is an integer number (423434434345).

Almost surely, 2^846868868689 is an apocalyptic number.

It is an amenable number.

846868868689 is a deficient number, since it is larger than the sum of its proper divisors (1).

846868868689 is an equidigital number, since it uses as much as digits as its factorization.

846868868689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12230590464, while the sum is 85.

The spelling of 846868868689 in words is "eight hundred forty-six billion, eight hundred sixty-eight million, eight hundred sixty-eight thousand, six hundred eighty-nine".