85865065078571 has 2 divisors, whose sum is σ = 85865065078572. Its totient is φ = 85865065078570.

The previous prime is 85865065078531. The next prime is 85865065078589. The reversal of 85865065078571 is 17587056056858.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85865065078571 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85865065078495 and 85865065078504.

It is not a weakly prime, because it can be changed into another prime (85865065078511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42932532539285 + 42932532539286.

It is an arithmetic number, because the mean of its divisors is an integer number (42932532539286).

Almost surely, 2^{85865065078571} is an apocalyptic number.

85865065078571 is a deficient number, since it is larger than the sum of its proper divisors (1).

85865065078571 is an equidigital number, since it uses as much as digits as its factorization.

85865065078571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 564480000, while the sum is 71.

The spelling of 85865065078571 in words is "eighty-five trillion, eight hundred sixty-five billion, sixty-five million, seventy-eight thousand, five hundred seventy-one".