CDLXIII is the Roman numeral representation for the number 463. In the Roman numeral system, letters are combined to signify values, where "C" stands for 100, "D" for 500, "L" for 50, "X" for 10, and "III" for 3. Therefore, CDLXIII can be broken down as 400 (CD) + 60 (LX) + 3 (III). Roman numerals, including CDLXIII, were widely used in ancient Rome for various purposes, such as numbering years, chapters, and pages. This numeral system is still used today in specific contexts, like clock faces and the naming of monarchs and popes, showcasing its enduring legacy in modern culture.