How do we remove the power notation of a number?

Questions
1

As an example Mathematica returns the the following number:

  -5.65491*10^13

I would like to have it expressed as -565491000000000

The obvious functions (to me) was to try

  N[-5.65491*10^13,30]
  NumberForm[-5.65491*10^13,30]

but both leave the number with power notation kept. What is the reason?

Thanks.

2

Try DecimalForm:

DecimalForm[-5.65491*10^13]

Round also works:

Round[-5.65491*10^13]
3

Thank you very much.