SQR help

In my SQR Amount= 451706005.21 is displaying as Amount= 45170600521.00

let #Amount= to_number(replace(edit($Amount, '999999.99'), '.', ''))

 move #Amount to $Amount 099999999999 ! Amount

While writing in file :

 write $filename from  $Sum:18  !16-33 Sum of $Amount

can you please help me on it?