285586566409 has 3 divisors (see below), whose sum is σ = 285587100813. Its totient is φ = 285586032006.

The previous prime is 285586566401. The next prime is 285586566431. The reversal of 285586566409 is 904665685582.

The square root of 285586566409 is 534403.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 285586566409 - 2³ = 285586566401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285586566401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 267202 + ... + 801604.

It is an arithmetic number, because the mean of its divisors is an integer number (95195700271).

Almost surely, 2^285586566409 is an apocalyptic number.

285586566409 is the 534403-rd square number.

285586566409 is the 267202-nd centered octagonal number.

It is an amenable number.

285586566409 is a deficient number, since it is larger than the sum of its proper divisors (534404).

285586566409 is an frugal number, since it uses more digits than its factorization.

285586566409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068806 (or 534403 counting only the distinct ones).

The product of its (nonzero) digits is 124416000, while the sum is 64.

Multiplying 285586566409 by its sum of digits (64), we get a square (18277540250176 = 4275224²).

The spelling of 285586566409 in words is "two hundred eighty-five billion, five hundred eighty-six million, five hundred sixty-six thousand, four hundred nine".