85691818 has 8 divisors (see below), whose sum is σ = 128598048. Its totient is φ = 42825804.

The previous prime is 85691803. The next prime is 85691821. The reversal of 85691818 is 81819658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3996 + ... + 13687.

It is an arithmetic number, because the mean of its divisors is an integer number (16074756).

Almost surely, 2^85691818 is an apocalyptic number.

85691818 is a deficient number, since it is larger than the sum of its proper divisors (42906230).

85691818 is a wasteful number, since it uses less digits than its factorization.

85691818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20108.

The product of its digits is 138240, while the sum is 46.

The square root of 85691818 is about 9256.9875229472. The cubic root of 85691818 is about 440.8726105761.

The spelling of 85691818 in words is "eighty-five million, six hundred ninety-one thousand, eight hundred eighteen".