The "periods" in a big number are the groups of 3 digits between the commas.
The correct way to write this big number is: 645,165,758 ... in 3 periods.
This already is a mixed numeral.
Eighty-three thousand and nine in numeral form is 83,009
5,000,314 is the numeral representing five million, three hundred and fourteen.
If you use the European method of separating the number sections, then there are two periods (67.254.376). If you use the US method, then there are no periods (67,254,376).
III
A non-numeral is any word or symbol that represents a numeral, but is not a numeral. Therefore, an example of a non-numeral less than ten is three.
The numeral is.. 6,014,385
0.03
376,143 is the number three hundred seventy six thousand one hundred and forty three written as a numeral.
thirteen and three hundred twenty one thousandth in base ten numeral
The numeral 303 is written or spoken "three hundred and three."
three hundred and eight