XICalc is a calculator for whole numbers that works under Windows, and is distributed completely free. These are some of its most important features:
* Multiple precision integers with millions of digits.
* Use Hartley transformations to accelerate large multiples.
* Separate notation for entry and exit, from base 2 to base 36.
* Support for functions such as the greatest common divisor, arithmetic module, Euler numbers, Bernoulli numbers, Boolean functions, random number generator, etc.
* Numerical functions such as Phi, Sigma and Tau.
* Algebraic notation.
* Goto and conditional statements of the If-then-else type.
* integrated help via the F1 key.
You can free download XICalc 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.