16638110011 has 4 divisors (see below), whose sum is σ = 16744085392. Its totient is φ = 16532134632.

The previous prime is 16638109993. The next prime is 16638110017. The reversal of 16638110011 is 11001183661.

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

It is a cyclic number.

It is not a de Polignac number, because 16638110011 - 2³³ = 8048175419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16638110017) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 52987455 + ... + 52987768.

It is an arithmetic number, because the mean of its divisors is an integer number (4186021348).

Almost surely, 2^16638110011 is an apocalyptic number.

16638110011 is a deficient number, since it is larger than the sum of its proper divisors (105975381).

16638110011 is a wasteful number, since it uses less digits than its factorization.

16638110011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105975380.

The product of its (nonzero) digits is 864, while the sum is 28.

Adding to 16638110011 its reverse (11001183661), we get a palindrome (27639293672).

The spelling of 16638110011 in words is "sixteen billion, six hundred thirty-eight million, one hundred ten thousand, eleven".