16163636 has 12 divisors (see below), whose sum is σ = 28567140. Its totient is φ = 8001600.

The previous prime is 16163627. The next prime is 16163639. The reversal of 16163636 is 63636161.

It can be written as a sum of positive squares in 2 ways, for example, as 15952036 + 211600 = 3994^2 + 460^2 .

It is a super-2 number, since 2×16163636² = 522526257480992, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

16163636 is a modest number, since divided by 3636 gives 1616 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16163639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19601 + ... + 20408.

It is an arithmetic number, because the mean of its divisors is an integer number (2380595).

Almost surely, 2^16163636 is an apocalyptic number.

It is an amenable number.

16163636 is a deficient number, since it is larger than the sum of its proper divisors (12403504).

16163636 is a wasteful number, since it uses less digits than its factorization.

16163636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40114 (or 40112 counting only the distinct ones).

The product of its digits is 11664, while the sum is 32.

The square root of 16163636 is about 4020.4024674154. The cubic root of 16163636 is about 252.8403331537.

Adding to 16163636 its reverse (63636161), we get a palindrome (79799797).

It can be divided in two parts, 1616 and 3636, that multiplied together give a square (5875776 = 2424²).

The spelling of 16163636 in words is "sixteen million, one hundred sixty-three thousand, six hundred thirty-six".