846868868609 has 2 divisors, whose sum is σ = 846868868610. Its totient is φ = 846868868608.

The previous prime is 846868868603. The next prime is 846868868689. The reversal of 846868868609 is 906868868648.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 656448346225 + 190420522384 = 810215^2 + 436372^2 .

It is a cyclic number.

It is not a de Polignac number, because 846868868609 - 2²⁸ = 846600433153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 846868868609.

It is not a weakly prime, because it can be changed into another prime (846868868603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423434434304 + 423434434305.

It is an arithmetic number, because the mean of its divisors is an integer number (423434434305).

Almost surely, 2^846868868609 is an apocalyptic number.

It is an amenable number.

846868868609 is a deficient number, since it is larger than the sum of its proper divisors (1).

846868868609 is an equidigital number, since it uses as much as digits as its factorization.

846868868609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1528823808, while the sum is 77.

The spelling of 846868868609 in words is "eight hundred forty-six billion, eight hundred sixty-eight million, eight hundred sixty-eight thousand, six hundred nine".