85855518 has 32 divisors (see below), whose sum is σ = 218046720. Its totient is φ = 24530040.

The previous prime is 85855513. The next prime is 85855529. The reversal of 85855518 is 81555858.

It is a happy number.

85855518 is a `hidden beast` number, since 8 + 585 + 55 + 18 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85855513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113188 + ... + 113943.

It is an arithmetic number, because the mean of its divisors is an integer number (6813960).

Almost surely, 2^85855518 is an apocalyptic number.

85855518 is an abundant number, since it is smaller than the sum of its proper divisors (132191202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85855518 is a wasteful number, since it uses less digits than its factorization.

85855518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227149 (or 227143 counting only the distinct ones).

The product of its digits is 320000, while the sum is 45.

The square root of 85855518 is about 9265.8252735523. The cubic root of 85855518 is about 441.1531699882.

The spelling of 85855518 in words is "eighty-five million, eight hundred fifty-five thousand, five hundred eighteen".