11551533123416 has 96 divisors (see below), whose sum is σ = 25699656553200. Its totient is φ = 4835227372800.

The previous prime is 11551533123401. The next prime is 11551533123419. The reversal of 11551533123416 is 61432133515511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11551533123419) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4177286 + ... + 6368106.

Almost surely, 2^{11551533123416} 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 11551533123416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12849828276600).

11551533123416 is an abundant number, since it is smaller than the sum of its proper divisors (14148123429784).

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

11551533123416 is a wasteful number, since it uses less digits than its factorization.

11551533123416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2191281 (or 2191266 counting only the distinct ones).

The product of its digits is 162000, while the sum is 41.

Adding to 11551533123416 its reverse (61432133515511), we get a palindrome (72983666638927).

The spelling of 11551533123416 in words is "eleven trillion, five hundred fifty-one billion, five hundred thirty-three million, one hundred twenty-three thousand, four hundred sixteen".