It is an Ulam number.
It is an alternating number because its digits alternate between odd and even.
1616 is an undulating number in base 10.
It is a plaindrome in base 7 and base 11.
It is a nialpdrome in base 13 and base 16.
It is a zygodrome in base 7.
It is a self number, because there is not a number n which added to its sum of digits gives 1616.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 1616.
1616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.
It is an amenable number.
1616 is a wasteful number, since it uses less digits than its factorization.
1616 is an evil number, because the sum of its binary digits is even.
The square root of 1616 is about 40.1995024845. The cubic root of 1616 is about 11.7349286169.
Adding to 1616 its reverse (6161), we get a palindrome (7777).
The spelling of 1616 in words is "one thousand, six hundred sixteen".