11818111552 has 112 divisors (see below), whose sum is σ = 26332891200. Its totient is φ = 5224826880.

The previous prime is 11818111537. The next prime is 11818111559. The reversal of 11818111552 is 25511181811.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (11818111559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3158899 + ... + 3162637.

It is an arithmetic number, because the mean of its divisors is an integer number (235115100).

Almost surely, 2^11818111552 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 11818111552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13166445600).

11818111552 is an abundant number, since it is smaller than the sum of its proper divisors (14514779648).

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

11818111552 is a wasteful number, since it uses less digits than its factorization.

11818111552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3924 (or 3914 counting only the distinct ones).

The product of its digits is 3200, while the sum is 34.

The spelling of 11818111552 in words is "eleven billion, eight hundred eighteen million, one hundred eleven thousand, five hundred fifty-two".