Forty-six is a Wedderburn-Etherington number, an enneagonal number and a centered triangular number.
46 is the sum of the totient function for the first twelve integers.
46 is the largest even integer that can't be expressed as a sum of two abundant numbers.
46 is the 13th semiprime.
46 is the third semiprime with a semiprime aliquot sum. The aliquot sequence of 46 is (46,26,16,15,9,4,3,1,0). Since it is possible to find sequences of 46 consecutive integers such that each inner member shares a factor with either the first or the last member, 46 is an Erdős–Woods number.
46 is the total of books in the Old Testament, Catholic version.
46 = the number of mountains in the 46 peaks of the Adirondack mountain range. People who have climbed all of them are called "forty-sixers"...
46 is the code for international direct dial phone calls to Sweden.
46 is the number of the City Chevrolet and Superflo cars driven by Cole Trickle in the movie Days of Thunder.
In 46 A.D a drought and an invasion of locusts hit the Mongolian steppes, causing a famine and a revolt at Xiongnu.
46 AD was the year 3806 in the Hebrew calendar, and the year 5554 in the Byzantine calendar. In the Buddhist calendar it was 509
Wow, that number 46 sure is cool!