Failed to read very large number in api.ai as parameter

I am developing a customer service chat bot to solve basic customer requests for my ecommerce site. My order ID is 13 digits long. To read queries like

"Please check the status of my order with ID 9876566765432"

api.ai cannot figure out what is the order id. I have set the entity type @sys.number

. It can identify a smaller number like 343434, etc. I tried with @sys.number-integer

, @sys.number-sequence

but didn't work for long numbers. Please advise ...