The Roman numeral "CDLXIV" represents the number 464. In Roman numerals, "CD" stands for 400, "LX" represents 60, and "IV" signifies 4. When combined, these values total 464. Roman numerals are a numeral system originating from ancient Rome, using combinations of letters from the Latin alphabet. Roman numerals are often used today in various contexts, such as in the naming of monarchs and popes, or to denote the year of production in movies. For example, the year 2023 might be represented as "MMXXIII" in Roman numerals.