11638011638 has 48 divisors (see below), whose sum is σ = 20107159632. Its totient is φ = 5009400000.

The previous prime is 11638011617. The next prime is 11638011653. The reversal of 11638011638 is 83611083611.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1170488 + ... + 1180388.

It is an arithmetic number, because the mean of its divisors is an integer number (418899159).

Almost surely, 2^11638011638 is an apocalyptic number.

11638011638 is a deficient number, since it is larger than the sum of its proper divisors (8469147994).

11638011638 is a wasteful number, since it uses less digits than its factorization.

11638011638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10061 (or 10038 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

Multiplying 11638011638 by its sum of digits (38), we get a palindrome (442244442244).

The spelling of 11638011638 in words is "eleven billion, six hundred thirty-eight million, eleven thousand, six hundred thirty-eight".