11638889900 has 36 divisors (see below), whose sum is σ = 27552429240. Its totient is φ = 4232323200.

The previous prime is 11638889839. The next prime is 11638889903. The reversal of 11638889900 is 998883611.

It is not an unprimeable number, because it can be changed into a prime (11638889903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5289305 + ... + 5291504.

Almost surely, 2^11638889900 is an apocalyptic number.

11638889900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11638889900 is an abundant number, since it is smaller than the sum of its proper divisors (15913539340).

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

11638889900 is a wasteful number, since it uses less digits than its factorization.

11638889900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10580834 (or 10580827 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 53.

The spelling of 11638889900 in words is "eleven billion, six hundred thirty-eight million, eight hundred eighty-nine thousand, nine hundred".