865865394284 has 18 divisors (see below), whose sum is σ = 1653027536412. Its totient is φ = 393572373600.

The previous prime is 865865394257. The next prime is 865865394287. The reversal of 865865394284 is 482493568568.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (865865394287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6102224 + ... + 6242504.

It is an arithmetic number, because the mean of its divisors is an integer number (91834863134).

Almost surely, 2^865865394284 is an apocalyptic number.

It is an amenable number.

865865394284 is a deficient number, since it is larger than the sum of its proper divisors (787162142128).

865865394284 is an frugal number, since it uses more digits than its factorization.

865865394284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280577 (or 140294 counting only the distinct ones).

The product of its digits is 398131200, while the sum is 68.

The spelling of 865865394284 in words is "eight hundred sixty-five billion, eight hundred sixty-five million, three hundred ninety-four thousand, two hundred eighty-four".