What are 5 numbers that are bigger than a trillion?

An obvious answer is, a trillion and one; a trillion and two; a trillion and three; a trillion and four; and a trillion and five. The moral is that it is always easy to find a larger number than any number given. Alternatively, you could double it, treble it, and so on. But I sense that you wanted a different kind of answer. I think that perhaps the answer you seek is: quadrillion, quintillion, sextillion, septillion, and octillion. The reason why I have not written out your answer in numerals is that there are nomenclatural differences in how words like 'billion', 'trillion', and the like are used. There is one usage in the U. S. A. and another in the rest of the world; although the former increasingly appears in financial publications in the dark, outside world, as finance increasingly presents itself as an international concern. In the U. S. A.: one billion = 1,000 X 1 million = 10^9; one trillion = 1 million-squared = 10^12; one quadrillion = 1,000 X 1 million-squared = 10^15; and so forth. In Britain, France, Canada, Germany, Italy, and the rest of the counting world: one milliard = 1 thousand million = 10^9; one billion = 1 million-squared = 10^12; one trillion = 1 million-cubed = 10^18; one quadrillion (if we can count that high) = one million to the fourth power = 10^24; and so forth. Many in the dark world outside, have abandoned the terms 'billion', 'trillion', and such-like, on the ground that ambiguity has destroyed their utility; and now we commonly speak of 'thousands of millions', 'millions of millions', and so, on. Clearly, we can be grateful that no one so far has seen fit, out of pride or ignorance or something else, to mix randomly the numbers 'one', 'two', 'three', 'four', and so forth, and that they thus retain their usefulness to us all.