64 is a number that has been around for centuries, and it has many different meanings. In the world of mathematics, 64 is an even composite number with four prime factors: 2x2x2x16. It can also be written as 4^3 or 8^2 and its square root is 8. As a binary system, 64 translates to 1000000 in base two.
In computing terms, 64-bit architecture refers to the use of processors which have registers (internal memory) and data buses (the pathways between components on the motherboard) that are sixty-four bits wide; this means they can process more information than 32-bit architectures which only use thirty two bit registers/data buses by comparison. This makes them faster at performing complex calculations quickly but may require more energy from your computer’s power supply unit when compared with 32-bits systems due to their higher processing speed requirements.