85817156 has 12 divisors (see below), whose sum is σ = 159014268. Its totient is φ = 40384512.

The previous prime is 85817131. The next prime is 85817191. The reversal of 85817156 is 65171858.

It can be written as a sum of positive squares in 2 ways, for example, as 40119556 + 45697600 = 6334^2 + 6760^2 .

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, 630941 + ... + 631076.

It is an arithmetic number, because the mean of its divisors is an integer number (13251189).

Almost surely, 2^85817156 is an apocalyptic number.

It is an amenable number.

85817156 is a deficient number, since it is larger than the sum of its proper divisors (73197112).

85817156 is a wasteful number, since it uses less digits than its factorization.

85817156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262038 (or 1262036 counting only the distinct ones).

The product of its digits is 67200, while the sum is 41.

The square root of 85817156 is about 9263.7549622170. The cubic root of 85817156 is about 441.0874547824.

The spelling of 85817156 in words is "eighty-five million, eight hundred seventeen thousand, one hundred fifty-six".