I had to type a 9-digit pin number on my phone to connect to a conference call the other day. This was after dialing the 10-digit number. This was after typing in my 4-digit pin on my phone. This was after typing my 10-digit password (lowercase, uppercase, numbers, symbols) into my computer to get to the telephone and conference call pin numbers.
No wonder I have recurring nightmares about long strings of numbers.