Need help calculating the total power output of the sun from the solar constant

Here's what i've got so far:

Solar Constant = 1370Wm-2 of solar Energy arrives at the top of Earth’s atmosphere.

Distance of Earth from the Sun = 1 AU = 149598000 km

Surface area of Sphere with Radius equal to 1 AU = 4 x x 149598000 x 103 = 1879903911000 m2

Total Energy output of the Sun = 1879903911000 x 1370 = 2,575,468,358,070,000 W

I know that the final answer is wrong from every source i've looked at so far. Where have i gone wrong?