6500
6500 K is the colour temperature of D65, the standard white point for screens.
- Even
- Composite
Why 6500 is special
It is what a display means by white. D65 approximates average daylight, and sRGB — the colour space almost every screen and web image assumes — is defined against it. Warmer settings look yellow only by comparison with this, which is why a night-mode display feels dimmer without any change in brightness.
Factors & digit properties
- Divisors (24)
- 1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 125, 130, 250, 260, 325, 500, 650, 1300, 1625, 3250, 6500
- Prime factorisation
- 2^2 × 5^3 × 13
- Digit sum
- 11
- Digital root
- 2
Representations
- Decimal
- 6500
- Scientific notation
- 6.500 × 10^3
Roman numerals
Roman numerals as modelled here goes up to 3,999.
Binary
1 1 0 0 1 0 1 1 0 0 1 0 0
1 × 4,096 + 1 × 2,048 + 0 × 1,024 + 0 × 512 + 1 × 256 + 0 × 128 + 1 × 64 + 1 × 32 + 0 × 16 + 0 × 8 + 1 × 4 + 0 × 2 + 0 × 1 = 6,500
Octal
1 4 5 4 4
1 × 4,096 + 4 × 512 + 5 × 64 + 4 × 8 + 4 × 1 = 6,500
Hexadecimal
1 9 6 4
1 × 4,096 + 9 × 256 + 6 × 16 + 4 × 1 = 6,500
Read as powers of two: 4,096 + 2,048 + 256 + 64 + 32 + 4 = 6,500.
In historical numeral systems
Egyptian
6 lotuses, 5 coils of rope
6 × 1,000 + 5 × 100 = 6,500. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
Other mathematical patterns
- Abundant number
Technology & computing
The colour temperature of the D65 standard white point is about 6500 kelvin (worldwide, CIE and sRGB). It approximates average daylight, and it is what a screen means by white. Warmer settings look yellow against it, which is why night-mode displays feel dimmer without changing brightness at all.
DocumentedTechnology & computingGeography: worldwide, CIE and sRGB
Common questions
Is 6500 a prime number?
No, 6500 is not prime.
What are the factors of 6500?
The factors of 6500 are 1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 125, 130, 250, 260, 325, 500, 650, 1300, 1625, 3250, 6500.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 15 July 2026