Number of zeros U.S. & scientific community Other
countries
3 thousand thousand
6 million million
9 billion 1000 million (1 milliard)
12 trillion billion
15 quadrillion 1000 billion
18 quintillion trillion
So that is $123,456,789,000,000,000 is $123 quintillion trillion
which is US$72,621,640,588,235,300 is just $72 quadrillion.
That is 10,374 times the GDP of the USA. Therefore, theorectically
speaking, you could own the whole world, first buy up all natural
resources, second buy up all convience stores, supermarkets, all of
it every single mom and pop store, which includes kopitiam, food
court, fast food, 7 11 etc Then buy up all the shares of MNCs and
all the businesses in the whole world and everyone will work under
you!
Thats world domination for you! 
Since everywhere you go, every shop you walk into, everything you
buy, you own it all! haha... 