85505685 has 16 divisors (see below), whose sum is σ = 137324160. Its totient is φ = 45431360.

The previous prime is 85505669. The next prime is 85505741. The reversal of 85505685 is 58650558.

It is not a de Polignac number, because 85505685 - 2⁴ = 85505669 is a prime.

It is a super-2 number, since 2×85505685² = 14622444334638450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 6561 + ... + 14630.

It is an arithmetic number, because the mean of its divisors is an integer number (8582760).

Almost surely, 2^85505685 is an apocalyptic number.

It is an amenable number.

85505685 is a deficient number, since it is larger than the sum of its proper divisors (51818475).

85505685 is a wasteful number, since it uses less digits than its factorization.

85505685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21468.

The product of its (nonzero) digits is 240000, while the sum is 42.

The square root of 85505685 is about 9246.9284089367. The cubic root of 85505685 is about 440.5531696198.

The spelling of 85505685 in words is "eighty-five million, five hundred five thousand, six hundred eighty-five".