11011116638 has 4 divisors (see below), whose sum is σ = 16516674960. Its totient is φ = 5505558318.

The previous prime is 11011116637. The next prime is 11011116643. The reversal of 11011116638 is 83661111011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83661111011 = 19 ⋅4403216369.

It is a self number, because there is not a number n which added to its sum of digits gives 11011116638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011116637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2752779158 + ... + 2752779161.

It is an arithmetic number, because the mean of its divisors is an integer number (4129168740).

Almost surely, 2^11011116638 is an apocalyptic number.

11011116638 is a deficient number, since it is larger than the sum of its proper divisors (5505558322).

11011116638 is an equidigital number, since it uses as much as digits as its factorization.

11011116638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5505558321.

The product of its (nonzero) digits is 864, while the sum is 29.

Adding to 11011116638 its reverse (83661111011), we get a palindrome (94672227649).

The spelling of 11011116638 in words is "eleven billion, eleven million, one hundred sixteen thousand, six hundred thirty-eight".