11638611 has 6 divisors (see below), whose sum is σ = 16811340. Its totient is φ = 7759068.

The previous prime is 11638603. The next prime is 11638631. The reversal of 11638611 is 11683611.

11638611 is a `hidden beast` number, since 1 + 16 + 38 + 611 = 666.

It is not a de Polignac number, because 11638611 - 2³ = 11638603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11638631) 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 5 ways as a sum of consecutive naturals, for example, 646581 + ... + 646598.

It is an arithmetic number, because the mean of its divisors is an integer number (2801890).

Almost surely, 2^11638611 is an apocalyptic number.

11638611 is a deficient number, since it is larger than the sum of its proper divisors (5172729).

11638611 is a wasteful number, since it uses less digits than its factorization.

11638611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293185 (or 1293182 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 11638611 is about 3411.5408542182. The cubic root of 11638611 is about 226.6211214238.

The spelling of 11638611 in words is "eleven million, six hundred thirty-eight thousand, six hundred eleven".