What is the exponent of 10000000000?

Answer 1

A number does not have an exponent in isolation. It has an exponent in the context of a base. The same number can have different combinations of base and exponent. For example, 64 = 8^2 or 4^3 or 2^6. A base cannot be zero but usually it is restricted to positive real numbers. In higher mathematics, the most common base is the irrational (even transcendental) number e = 2.71828...