285085000891 has 4 divisors (see below), whose sum is σ = 285107246032. Its totient is φ = 285062755752.

The previous prime is 285085000841. The next prime is 285085000903. The reversal of 285085000891 is 198000580582.

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 285085000891 - 2⁷ = 285085000763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285085000841) 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, 11103336 + ... + 11128981.

It is an arithmetic number, because the mean of its divisors is an integer number (71276811508).

Almost surely, 2^285085000891 is an apocalyptic number.

285085000891 is a deficient number, since it is larger than the sum of its proper divisors (22245141).

285085000891 is a wasteful number, since it uses less digits than its factorization.

285085000891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22245140.

The product of its (nonzero) digits is 230400, while the sum is 46.

The spelling of 285085000891 in words is "two hundred eighty-five billion, eighty-five million, eight hundred ninety-one", and thus it is an aban number.