I owe you $100 and I'll pay you back in 1 million seconds. What is 1 million seconds? I million seconds = 12 days. So what is I billion seconds? I billion seconds = 32 years. What is 1 Trillion seconds? 1 Trillion second = 32,000 years. The USA owes 16 trillion dollars or 512,000 years worth of debt! Just to get a perspective!