I was thinking about how population influences the power dynamics in a polity. The community that has the majority has more say in political discourse. Can we use the term "Numerical power" to describe the power of such a community? Would it be sociologically correct to say so?
It is a form of speech that is used, but it's rare, and a bit awkward.
You have to make a case for why greater numbers mean greater power. For instance, pensioners are very likely to vote, under 25 year olds are not, so in elections numbers do not equate to political influence.
National or regional majorities, might usually fill the role, relating to voting potential. Or cohesive power block, referring to groups with very similar politics, or highly motivated by specific issues.