bodleing: Ok, seeing as most of the money is owed to China,
Hows this for a big number, (might even be a couple of noughts missing)
$53 trillion or 362,321,240,899.9000 Chines Yuan.
But I think they want it back in dollars.
I think your right about the naughts... doesn't a can of soda go for about 10,000 yuan?