Oh, isn't that a happy little number? To write 1.365 billion, you simply write the number 1 followed by a comma, then write 365 million after it. It's just like painting a beautiful landscape - take your time, be gentle with your strokes, and remember, there are no mistakes, just happy little accidents.
I write 620 billion as 620 billion.
Sixteen point two billion is how I would write it.
You write 3.56 billion as 3,560,000,000.
292, as a percentage of 1365 is 100*292/1365 = 21.392% (to 3 dp)
40,300,000,000
The NGC 1365 galaxy is a barred spiral galaxy 56 million light-years from Earth in the Fornax constellation, and is 200,000 light-years in diameter, and contains about 400 billion stars.
I write 620 billion as 620 billion.
Sixteen point two billion is how I would write it.
1365
You write 3.56 billion as 3,560,000,000.
292, as a percentage of 1365 is 100*292/1365 = 21.392% (to 3 dp)
40,300,000,000
195
1365
As a number it is: 1,800,000,000 = 1.8 billion
Since you asked how I would write the number, the answer is 1031.
1,000 billion billion is: 1,000,000,000,000,000,000,000