11556544812 has 24 divisors (see below), whose sum is σ = 27016844736. Its totient is φ = 3844813968.

The previous prime is 11556544751. The next prime is 11556544843. The reversal of 11556544812 is 21844565511.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 914418 + ... + 926969.

It is an arithmetic number, because the mean of its divisors is an integer number (1125701864).

Almost surely, 2^11556544812 is an apocalyptic number.

11556544812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11556544812 is an abundant number, since it is smaller than the sum of its proper divisors (15460299924).

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

11556544812 is a wasteful number, since it uses less digits than its factorization.

11556544812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841917 (or 1841915 counting only the distinct ones).

The product of its digits is 192000, while the sum is 42.

The spelling of 11556544812 in words is "eleven billion, five hundred fifty-six million, five hundred forty-four thousand, eight hundred twelve".