85581518 has 16 divisors (see below), whose sum is σ = 143828784. Its totient is φ = 37848960.

The previous prime is 85581479. The next prime is 85581521. The reversal of 85581518 is 81518558.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51755 + ... + 53382.

It is an arithmetic number, because the mean of its divisors is an integer number (8989299).

Almost surely, 2^85581518 is an apocalyptic number.

85581518 is a deficient number, since it is larger than the sum of its proper divisors (58247266).

85581518 is a wasteful number, since it uses less digits than its factorization.

85581518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105187.

The product of its digits is 64000, while the sum is 41.

The square root of 85581518 is about 9251.0279428829. The cubic root of 85581518 is about 440.6833699177.

The spelling of 85581518 in words is "eighty-five million, five hundred eighty-one thousand, five hundred eighteen".