5 to the 21st power
1.967151357289562
5^10 ÷ 5^3 = 5^(10-3) = 5^7 [= 78125]
75 to the 10th power (to the power of 10) is 5.63x10^8.
Zero to the 10th power is 0. Zero to any power will always be 0.
The square root of x to the 10th power is x to the 10th power raised to the 1/2 power, which simplifies to x to the 10/2 power. This further simplifies to x to the 5th power. Therefore, the square root of x to the 10th power is x to the 5th power.
5.0 × 1010 written in regular notation is 50,000,000,000 (50 billion).
2¹⁰ + 2¹⁰ = 2 × 2¹⁰ = 2¹¹ = 2048
3,661,510,899,651,594,831,102,976
infinity
One.
As far as I know, it doesn't have a special name. It's 10^(10^googol) = 10^[10^(10^100)] where the symbol ^ means 'to the power of'.