In logarithms, big numbers aren't so much bigger than small numbers. So depends on the scale being used. Also matter is only 4% of the observable universe. We don't really know what the rest of it is made of.

Again combinatorics trumps ... a given 100 digit random number is one of 10^100 (googol) combinations possible. Look up googolplex ... 10^(10^100).

The majority of numbers are irrational, and only a finite number of irrational numbers can be symbolized ... like Pi or E. There are an infinite number of rational numbers between 0 and 1 ... and for each rational number, there are an infinite number of irrational numbers.