Fugafour

Fugafour is equal to 44 3  = 464 = 2128 = 22 7, or 4↓↓4 using down-arrow notation. The name is formed by applying the fuga- prefix to 4. It is approximately 3.4028*1038 using scientific notation, and it is about 340 undecillion in the short scale or 340 sextillion in the long scale.