85165559 has 4 divisors (see below), whose sum is σ = 85193616. Its totient is φ = 85137504.

The previous prime is 85165513. The next prime is 85165567. The reversal of 85165559 is 95556158.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85165559 - 2¹² = 85161463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85165579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8834 + ... + 15759.

It is an arithmetic number, because the mean of its divisors is an integer number (21298404).

Almost surely, 2^85165559 is an apocalyptic number.

85165559 is a deficient number, since it is larger than the sum of its proper divisors (28057).

85165559 is a wasteful number, since it uses less digits than its factorization.

85165559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28056.

The product of its digits is 270000, while the sum is 44.

The square root of 85165559 is about 9228.5187868910. The cubic root of 85165559 is about 439.9682466755.

The spelling of 85165559 in words is "eighty-five million, one hundred sixty-five thousand, five hundred fifty-nine".