11521214544 has 80 divisors (see below), whose sum is σ = 34327187840. Its totient is φ = 3261565440.

The previous prime is 11521214543. The next prime is 11521214567. The reversal of 11521214544 is 44541212511.

11521214544 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 not an unprimeable number, because it can be changed into a prime (11521214543) by changing a digit.

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, 120667 + ... + 193914.

It is an arithmetic number, because the mean of its divisors is an integer number (429089848).

Almost surely, 2^11521214544 is an apocalyptic number.

11521214544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

11521214544 is an abundant number, since it is smaller than the sum of its proper divisors (22805973296).

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

11521214544 is a wasteful number, since it uses less digits than its factorization.

11521214544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314708 (or 314702 counting only the distinct ones).

The product of its digits is 6400, while the sum is 30.

The spelling of 11521214544 in words is "eleven billion, five hundred twenty-one million, two hundred fourteen thousand, five hundred forty-four".