11881447040 has 32 divisors (see below), whose sum is σ = 28404085860. Its totient is φ = 4752578560.

The previous prime is 11881447013. The next prime is 11881447043. The reversal of 11881447040 is 4074418811.

It can be written as a sum of positive squares in 2 ways, for example, as 9766182976 + 2115264064 = 98824^2 + 45992^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 11881446985 and 11881447003.

It is not an unprimeable number, because it can be changed into a prime (11881447043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9281741 + ... + 9283020.

Almost surely, 2^11881447040 is an apocalyptic number.

11881447040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11881447040 is an abundant number, since it is smaller than the sum of its proper divisors (16522638820).

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

11881447040 is an equidigital number, since it uses as much as digits as its factorization.

11881447040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18564780 (or 18564768 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 38.

The spelling of 11881447040 in words is "eleven billion, eight hundred eighty-one million, four hundred forty-seven thousand, forty".