161

Because morse code was time consuming and often expensive, users in the olden days came up with a lot of abbreviations.  They came up with a list of 2 digit numbers and what they stood for.  The meanings would have nothing to do with the numbers.  Most are not used today.

A few that are still used:

• 73 means "Best wishes" often used as a sign-off.

• 88 means "Hugs and kisses", also used as a sign-off, mostly to a HAM of the opposite gender.

• 161 (since it is 73+88) is used to say both, either to someone you really like, or to a couple where one of them is the opposite gender from you.