11556404540 has 48 divisors (see below), whose sum is σ = 24556815360. Its totient is φ = 4567864320.

The previous prime is 11556404507. The next prime is 11556404569. The reversal of 11556404540 is 4540465511.

11556404540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11556404540² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11556404540.

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 15 ways as a sum of consecutive naturals, for example, 828020 + ... + 841860.

It is an arithmetic number, because the mean of its divisors is an integer number (511600320).

Almost surely, 2^11556404540 is an apocalyptic number.

11556404540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11556404540 is an abundant number, since it is smaller than the sum of its proper divisors (13000410820).

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

11556404540 is a wasteful number, since it uses less digits than its factorization.

11556404540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14342 (or 14340 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

The spelling of 11556404540 in words is "eleven billion, five hundred fifty-six million, four hundred four thousand, five hundred forty".