why number 8549176320 is one of a kind?

Can you solve the rebus below?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

Which is heavier: a ton of bricks or a ton of feathers?

What came first, the chicken or the egg?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

If you say my name, I will no longer exist. What am I?

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

I can turn polar bears white.
I can make anyone dance.
I can make everyone cry
I can make your hands clap
I can make you thin.
I can make you smile.
I can make you smile

Can you guess the riddle?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?