855085085 has 4 divisors (see below), whose sum is σ = 1026102108. Its totient is φ = 684068064.

The previous prime is 855085081. The next prime is 855085103. The reversal of 855085085 is 580580558.

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

It can be written as a sum of positive squares in 2 ways, for example, as 326958724 + 528126361 = 18082^2 + 22981^2 .

It is a cyclic number.

It is not a de Polignac number, because 855085085 - 2² = 855085081 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 (855085081) 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, 85508504 + ... + 85508513.

It is an arithmetic number, because the mean of its divisors is an integer number (256525527).

Almost surely, 2^855085085 is an apocalyptic number.

It is an amenable number.

855085085 is a deficient number, since it is larger than the sum of its proper divisors (171017023).

855085085 is a wasteful number, since it uses less digits than its factorization.

855085085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171017022.

The product of its (nonzero) digits is 320000, while the sum is 44.

The square root of 855085085 is about 29241.8379210336. The cubic root of 855085085 is about 949.1534785968.

The spelling of 855085085 in words is "eight hundred fifty-five million, eighty-five thousand, eighty-five".