First off, you're just one of a LOT of people. For example, the US is the 3rd most-populous country in the world, but it would have to gain more than a BILLION people to become #1.
According to the CIA, the population of the US in 2017 is a little over 325 billion people. That's over 950 million fewer than India (about 1.282 billion) and over 1.05 billion fewer than China (about 1.379 billion)