85865512548589 has 2 divisors, whose sum is σ = 85865512548590. Its totient is φ = 85865512548588.

The previous prime is 85865512548587. The next prime is 85865512548611. The reversal of 85865512548589 is 98584521556858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84437169660900 + 1428342887689 = 9188970^2 + 1195133^2 .

It is a cyclic number.

It is not a de Polignac number, because 85865512548589 - 2¹ = 85865512548587 is a prime.

Together with 85865512548587, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85865512548587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42932756274294 + 42932756274295.

It is an arithmetic number, because the mean of its divisors is an integer number (42932756274295).

Almost surely, 2^{85865512548589} is an apocalyptic number.

It is an amenable number.

85865512548589 is a deficient number, since it is larger than the sum of its proper divisors (1).

85865512548589 is an equidigital number, since it uses as much as digits as its factorization.

85865512548589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5529600000, while the sum is 79.

The spelling of 85865512548589 in words is "eighty-five trillion, eight hundred sixty-five billion, five hundred twelve million, five hundred forty-eight thousand, five hundred eighty-nine".