### 44.16 Prefixes

These constants are dimensionless scaling factors.

`GSL_CONST_NUM_YOTTA`

  10^24

`GSL_CONST_NUM_ZETTA`

  10^21

`GSL_CONST_NUM_EXA`

  10^18

`GSL_CONST_NUM_PETA`

  10^15

`GSL_CONST_NUM_TERA`

  10^12

`GSL_CONST_NUM_GIGA`

  10^9

`GSL_CONST_NUM_MEGA`

  10^6

`GSL_CONST_NUM_KILO`

  10^3

`GSL_CONST_NUM_MILLI`

  10^-3

`GSL_CONST_NUM_MICRO`

  10^-6

`GSL_CONST_NUM_NANO`

  10^-9

`GSL_CONST_NUM_PICO`

  10^-12

`GSL_CONST_NUM_FEMTO`

  10^-15

`GSL_CONST_NUM_ATTO`

  10^-18

`GSL_CONST_NUM_ZEPTO`

  10^-21

`GSL_CONST_NUM_YOCTO`

  10^-24