16636541 has 4 divisors (see below), whose sum is σ = 16950492. Its totient is φ = 16322592.

The previous prime is 16636519. The next prime is 16636559. The reversal of 16636541 is 14563661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14092516 + 2544025 = 3754^2 + 1595^2 .

It is a cyclic number.

It is not a de Polignac number, because 16636541 - 2¹⁴ = 16620157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16636498 and 16636507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16636511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156896 + ... + 157001.

It is an arithmetic number, because the mean of its divisors is an integer number (4237623).

Almost surely, 2^16636541 is an apocalyptic number.

It is an amenable number.

16636541 is a deficient number, since it is larger than the sum of its proper divisors (313951).

16636541 is an equidigital number, since it uses as much as digits as its factorization.

16636541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313950.

The product of its digits is 12960, while the sum is 32.

The square root of 16636541 is about 4078.7916102689. The cubic root of 16636541 is about 255.2824807587.

The spelling of 16636541 in words is "sixteen million, six hundred thirty-six thousand, five hundred forty-one".