11550020440 has 32 divisors (see below), whose sum is σ = 29700053280. Its totient is φ = 3960006912.

The previous prime is 11550020407. The next prime is 11550020453. The reversal of 11550020440 is 4402005511.

11550020440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20624757 + ... + 20625316.

It is an arithmetic number, because the mean of its divisors is an integer number (928126665).

Almost surely, 2^11550020440 is an apocalyptic number.

11550020440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11550020440 is an abundant number, since it is smaller than the sum of its proper divisors (18150032840).

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

11550020440 is a wasteful number, since it uses less digits than its factorization.

11550020440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41250091 (or 41250087 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

Adding to 11550020440 its reverse (4402005511), we get a palindrome (15952025951).

The spelling of 11550020440 in words is "eleven billion, five hundred fifty million, twenty thousand, four hundred forty".