64 in Roman numerals
LXIV
The number 64 is written LXIV in Roman numerals.
How LXIV breaks down
| Symbols | Value |
|---|---|
L | 50 |
X | 10 |
IV | 4 |
LXIV | 64 |
This numeral uses the subtractive rule: a smaller symbol placed before a larger one is subtracted from it. Only six such pairs are legal — IV (4), IX (9), XL (40), XC (90), CD (400) and CM (900).
Nearby numbers
| Number | Roman numeral |
|---|---|
| 59 | LIX |
| 60 | LX |
| 61 | LXI |
| 62 | LXII |
| 63 | LXIII |
| 64 | LXIV |
| 65 | LXV |
| 66 | LXVI |
| 67 | LXVII |
| 68 | LXVIII |
| 69 | LXIX |
The seven symbols
I | 1 | C | 100 |
V | 5 | D | 500 |
X | 10 | M | 1,000 |
L | 50 |
64 in other notations
| Roman | LXIV |
| Binary | 1000000 |
| Hexadecimal | 40 |
| Octal | 100 |
| Written out | sixty-four |
Writing it by hand
Work down through the symbol values, taking as many of each as will fit before moving to the next. For 64:
L = 50 remaining: 14
X = 10 remaining: 4
IV = 4 remaining: 0The result reads LXIV — 4 characters, against 2 digits in Arabic numerals.
Frequently asked questions
What is 64 in Roman numerals?
LXIV
How do you read LXIV?
Work left to right, adding each symbol — except where a smaller symbol precedes a larger one, in which case it is subtracted. L is 50, X is 10, IV is 4, giving 64 in total.
How do you write 64 in words?
sixty-four.
Why is there no zero?
Roman numerals have no symbol for zero. The concept reached Europe only with Hindu-Arabic numerals, centuries after the system was in use — which is a large part of why it was eventually replaced for arithmetic.