500 billion is less than one trillion. It takes 2.0 of these to make a trillion.
For context: a billion dollars could fund a medium-sized city for a year, while a trillion is roughly the GDP of a large country.
This result uses the short-scale system. In the short scale (US/UK), 1 trillion = 1,000 billion. In the long scale (EU), 1 trillion = 1,000,000 billion.
Next stepNeed to compare to other large-number scales? Check the reference table below for millions, billions, trillions, quadrillions and their zeros and powers of ten.