851836085 has 8 divisors (see below), whose sum is σ = 1082333016. Its totient is φ = 641382400.

The previous prime is 851836081. The next prime is 851836091. The reversal of 851836085 is 580638158.

It can be written as a sum of positive squares in 4 ways, for example, as 13965169 + 837870916 = 3737^2 + 28946^2 .

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

It is not a de Polignac number, because 851836085 - 2² = 851836081 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851836081) 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, 5010716 + ... + 5010885.

It is an arithmetic number, because the mean of its divisors is an integer number (135291627).

Almost surely, 2^851836085 is an apocalyptic number.

851836085 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

851836085 is a deficient number, since it is larger than the sum of its proper divisors (230496931).

851836085 is a wasteful number, since it uses less digits than its factorization.

851836085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10021623.

The product of its (nonzero) digits is 230400, while the sum is 44.

The square root of 851836085 is about 29186.2310859076. The cubic root of 851836085 is about 947.9498113715.

The spelling of 851836085 in words is "eight hundred fifty-one million, eight hundred thirty-six thousand, eighty-five".