11111117643472 has 120 divisors (see below), whose sum is σ = 27321026779872. Its totient is φ = 4328705606400.

The previous prime is 11111117643427. The next prime is 11111117643491. The reversal of 11111117643472 is 27434671111111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154946058 + ... + 155017750.

Almost surely, 2^{11111117643472} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11111117643472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13660513389936).

11111117643472 is an abundant number, since it is smaller than the sum of its proper divisors (16209909136400).

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

11111117643472 is a wasteful number, since it uses less digits than its factorization.

11111117643472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89697 (or 89684 counting only the distinct ones).

The product of its digits is 28224, while the sum is 40.

Adding to 11111117643472 its reverse (27434671111111), we get a palindrome (38545788754583).

The spelling of 11111117643472 in words is "eleven trillion, one hundred eleven billion, one hundred seventeen million, six hundred forty-three thousand, four hundred seventy-two".