2 to the 40th power is the same as 2 times itself 40 times.
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It's almost always called "ten to the fortieth", and it's written like this: 1040
120
A power means the number is mulitplied by itself the "power" number of times Thus 2 to the power 2 is the same as 2*2 2 to the power 3 is the same as 2*2*2 2 to the power 5 is the same as 2*2*2*2*2 So 2 to the power 40 is the same as 2*2*2....*2 (with 40 twos), which = 1099511627776
2 to the 100th power.
2¹⁰ + 2¹⁰ = 2 × 2¹⁰ = 2¹¹ = 2048