85581109 has 8 divisors (see below), whose sum is σ = 87676928. Its totient is φ = 83507760.

The previous prime is 85581107. The next prime is 85581113. The reversal of 85581109 is 90118558.

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

It is a cyclic number.

It is not a de Polignac number, because 85581109 - 2¹ = 85581107 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 (85581107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2224 + ... + 13270.

It is an arithmetic number, because the mean of its divisors is an integer number (10959616).

Almost surely, 2^85581109 is an apocalyptic number.

It is an amenable number.

85581109 is a deficient number, since it is larger than the sum of its proper divisors (2095819).

85581109 is a wasteful number, since it uses less digits than its factorization.

85581109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11235.

The product of its (nonzero) digits is 14400, while the sum is 37.

The square root of 85581109 is about 9251.0058372049. The cubic root of 85581109 is about 440.6826678978.

The spelling of 85581109 in words is "eighty-five million, five hundred eighty-one thousand, one hundred nine".