What is the name of the category that describes all the ways a number can be read?

Written numbers can be read aloud in multiple different ways:

1. Nominal numbers can be read by pronouncing each digit individually: "My phone number is 123456" read as "one, two, three…"
2. Nominal numbers can also be read by chunking digits together where each chunk is read as a separate whole number: "123456" read as "twelve, thirty-four, fifty-six"
3. Cardinal numbers can be read as whole numbers: "I’m 40 years old" read as "Forty"
4. Ordinal number where digits are read as a single number but in a way that is different from cardinal numbers: "February 25, 1991" read as "Twenty-fifth"

What is the name of the linguistic or phonetic category that describes all the different ways a number can be read?