Sudoku Numbers

Some numbers regarding classical Sudoku (9x9 grid):

81: number of cells in a Sudoku grid.

17: the minimum number of givens in order to have a uniquely completable grid.

49151: the number of different grids with 17 givens actually known.

6,670,903,752,021,072,936,960: ~6.67×1021, number of possible ways of filling in a Sudoku grid.

Mega Sudoku Free


Complete, easy and intuitive to use Sudoku app. All puzzles are tested and guaranteed to have one and only one solution, they are real sudoku grids. Games are saved and you can resume them later. Unfinished puzzles are listed in a graphical way and easy to find.

  • Totally free
  • Each sudoku grid has an unique solution
  • 3 levels: easy, medium, hard
  • 3 input methods: numpad, single number, popup
  • Resume function
  • Graphical list of the sudoku puzzles
  • Pencil button to fill in note
  • Auto-save
  • Total time spent on each sudoku puzzle
  • Undo function
  • Checkpoint undo function
  • Hints for solving (highlight wrong values, highlight completed numbers and count of each number)
  • Edit function to add your custom sudoku puzzle



Android app on Google Play


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