No matter your political views, THAT'S A BIG FREAKIN' NUMBER.
Using the latest U.S. Census Population Clock estimate (305,897,898), that's:
$13,076.25 per person*
As John would say--Yikes!
UPDATE: More evidence that that's a big freakin' number from the WSJ:
Even taking every taxable "dime" of everyone earning more than $75,000 in 2006 would have barely yielded enough to cover that $4 trillion.
*or $65,381 for my family.