4085000010085 has 4 divisors (see below), whose sum is σ = 4902000012108. Its totient is φ = 3268000008064.

The previous prime is 4085000010043. The next prime is 4085000010101. The reversal of 4085000010085 is 5800100005804.

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 687138207844 + 3397861802241 = 828938^2 + 1843329^2 .

It is a cyclic number.

It is not a de Polignac number, because 4085000010085 - 2⁷ = 4085000009957 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408500001004 + ... + 408500001013.

It is an arithmetic number, because the mean of its divisors is an integer number (1225500003027).

Almost surely, 2^{4085000010085} is an apocalyptic number.

It is an amenable number.

4085000010085 is a deficient number, since it is larger than the sum of its proper divisors (817000002023).

4085000010085 is an equidigital number, since it uses as much as digits as its factorization.

4085000010085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817000002022.

The product of its (nonzero) digits is 6400, while the sum is 31.

Adding to 4085000010085 its reverse (5800100005804), we get a palindrome (9885100015889).

The spelling of 4085000010085 in words is "four trillion, eighty-five billion, ten thousand, eighty-five".