When I look at a sequence of numbers, I can close my eyes and read the numbers out. This is how I normally remember phone numbers, id numbers and everything else including numbers. However, if I don't go through the process of reading it out within a few minutes or so, I may interchange the position of two numbers. Now, I don't think I have a photographic memory, far from it, I wouldn't be able to read out a text from sheer memory for example. Could you say weak or semi photographic? Or maybe this just means I have a good short memory?