285870564889 has 24 divisors (see below), whose sum is σ = 358539229440. Its totient is φ = 225920780064.

The previous prime is 285870564827. The next prime is 285870564913. The reversal of 285870564889 is 988465078582.

It is not a de Polignac number, because 285870564889 - 2¹¹ = 285870562841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (285870565889) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 289722 + ... + 809740.

It is an arithmetic number, because the mean of its divisors is an integer number (14939134560).

Almost surely, 2^285870564889 is an apocalyptic number.

It is an amenable number.

285870564889 is a deficient number, since it is larger than the sum of its proper divisors (72668664551).

285870564889 is a wasteful number, since it uses less digits than its factorization.

285870564889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520909 (or 520902 counting only the distinct ones).

The product of its (nonzero) digits is 309657600, while the sum is 70.

The spelling of 285870564889 in words is "two hundred eighty-five billion, eight hundred seventy million, five hundred sixty-four thousand, eight hundred eighty-nine".