285217645285 has 32 divisors (see below), whose sum is σ = 369330255360. Its totient is φ = 210750216768.

The previous prime is 285217645277. The next prime is 285217645289. The reversal of 285217645285 is 582546712582.

It is not a de Polignac number, because 285217645285 - 2³ = 285217645277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285217645289) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2170674 + ... + 2298316.

It is an arithmetic number, because the mean of its divisors is an integer number (11541570480).

Almost surely, 2^285217645285 is an apocalyptic number.

It is an amenable number.

285217645285 is a deficient number, since it is larger than the sum of its proper divisors (84112610075).

285217645285 is a wasteful number, since it uses less digits than its factorization.

285217645285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128257.

The product of its digits is 10752000, while the sum is 55.

The spelling of 285217645285 in words is "two hundred eighty-five billion, two hundred seventeen million, six hundred forty-five thousand, two hundred eighty-five".