What is 5 to the power of 18 ?What is 5 to the power of 18 ?Solution: 518 = 3814697265625simplify this: All that is needed is to multiply it out:5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 = 3814697265625 So, 5 to the power of 18 is 3814697265625.