1616 has 10 divisors (see below), whose sum is σ = 3162. Its totient is φ = 800.

The previous prime is 1613. The next prime is 1619. The reversal of 1616 is 6161.

It is an interprime number because it is at equal distance from previous prime (1613) and next prime (1619).

It can be written as a sum of positive squares in only one way, i.e., 1600 + 16 = 40^2 + 4^2 .

It is a super-2 number, since 2×1616² = 5222912, which contains 22 as substring.

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.

It is not an unprimeable number, because it can be changed into a prime (1613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35 + ... + 66.

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 deficient number, since it is larger than the sum of its proper divisors (1546).

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 sum of its prime factors is 109 (or 103 counting only the distinct ones).

The product of its digits is 36, while the sum is 14.

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).

It can be divided in two parts, 16 and 16, that added together give a 5-th power (32 = 2⁵).

The spelling of 1616 in words is "one thousand, six hundred sixteen".