11940543888 has 160 divisors (see below), whose sum is σ = 38119560192. Its totient is φ = 3136320000.

The previous prime is 11940543883. The next prime is 11940543913. The reversal of 11940543888 is 88834504911.

It is a self number, because there is not a number n which added to its sum of digits gives 11940543888.

It is not an unprimeable number, because it can be changed into a prime (11940543883) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1090923 + ... + 1101813.

Almost surely, 2^11940543888 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 11940543888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19059780096).

11940543888 is an abundant number, since it is smaller than the sum of its proper divisors (26179016304).

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

11940543888 is a wasteful number, since it uses less digits than its factorization.

11940543888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11173 (or 11167 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 51.

The spelling of 11940543888 in words is "eleven billion, nine hundred forty million, five hundred forty-three thousand, eight hundred eighty-eight".