16536636 has 84 divisors (see below), whose sum is σ = 44620632. Its totient is φ = 5357664.

The previous prime is 16536613. The next prime is 16536643. The reversal of 16536636 is 63663561.

It is a happy number.

16536636 is a `hidden beast` number, since 16 + 5 + 3 + 6 + 636 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 16536636.

It is a congruent number.

It is an unprimeable number.

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 27 ways as a sum of consecutive naturals, for example, 154495 + ... + 154601.

It is an arithmetic number, because the mean of its divisors is an integer number (531198).

Almost surely, 2^16536636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16536636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22310316).

16536636 is an abundant number, since it is smaller than the sum of its proper divisors (28083996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16536636 is a wasteful number, since it uses less digits than its factorization.

16536636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 165 counting only the distinct ones).

The product of its digits is 58320, while the sum is 36.

The square root of 16536636 is about 4066.5262817299. The cubic root of 16536636 is about 254.7704508630.

The spelling of 16536636 in words is "sixteen million, five hundred thirty-six thousand, six hundred thirty-six".