It is a happy number.
It is a Duffinian number.
It is an unprimeable number.
Almost surely, 216440450287705 is an apocalyptic number.
It is an amenable number.
16440450287705 is a wasteful number, since it uses less digits than its factorization.
16440450287705 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1493907448.
The spelling of 16440450287705 in words is "sixteen trillion, four hundred forty billion, four hundred fifty million, two hundred eighty-seven thousand, seven hundred five".