85685573867 has 2 divisors, whose sum is σ = 85685573868. Its totient is φ = 85685573866.

The previous prime is 85685573849. The next prime is 85685573887. The reversal of 85685573867 is 76837558658.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85685573867 - 2¹² = 85685569771 is a prime.

It is a super-2 number, since 2×85685573867² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85685573797 and 85685573806.

It is not a weakly prime, because it can be changed into another prime (85685573887) 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, 42842786933 + 42842786934.

It is an arithmetic number, because the mean of its divisors is an integer number (42842786934).

Almost surely, 2^85685573867 is an apocalyptic number.

85685573867 is a deficient number, since it is larger than the sum of its proper divisors (1).

85685573867 is an equidigital number, since it uses as much as digits as its factorization.

85685573867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688000, while the sum is 68.

The spelling of 85685573867 in words is "eighty-five billion, six hundred eighty-five million, five hundred seventy-three thousand, eight hundred sixty-seven".