The number 16 is a perfect square, meaning it is the result of multiplying an integer by itself. Specifically, 16 is the square of 4, as 4 \times 4 = 16. Perfect squares are important in mathematics and are often used in various calculations, including geometry and algebra. In addition to its mathematical significance, 16 has various applications in everyday life. For example, it is the number of ounces in a pint and is commonly used in gaming, such as in the 16-bit era of video games. The number also appears in music, where a common time signature is 4/4, often counted in groups of 16 beats.