So the entire worlds output of nuclear power is
No, that's just Exawatts. You need to multiply it by the runtime per year, which you can comfortably call 8500 hours, allowing for downtime. So that makes it 3.16 ExaWatt-hours, which is just about a third of oil's output, but you can still have oil for mobile transport for quite a while and flip all the power plants to nuclear, that would certainly help,.
Oh, and perhaps you should consider smoking less crack. Or posting to Slashdot whilst under the effects of said crack. Or both.