Digit product calculator
Multiply all the digits of any number together. Also shows multiplicative persistence — how many times you must repeat until reaching a single digit.
Number
What is digit product?
Multiply all individual digits. For 12345: 1×2×3×4×5 = 120. Note: any number containing 0 has digit product 0.
Multiplicative persistence
Keep multiplying digits until single digit. 679 → 6×7×9 = 378 → 3×7×8 = 168 → 1×6×8 = 48 → 4×8 = 32 → 3×2 = 6. That took 5 steps — persistence = 5.
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