11541212440 has 16 divisors (see below), whose sum is σ = 25967728080. Its totient is φ = 4616484960.

The previous prime is 11541212407. The next prime is 11541212443. The reversal of 11541212440 is 4421214511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11541212443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144265116 + ... + 144265195.

It is an arithmetic number, because the mean of its divisors is an integer number (1622983005).

Almost surely, 2^11541212440 is an apocalyptic number.

11541212440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11541212440 is an abundant number, since it is smaller than the sum of its proper divisors (14426515640).

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

11541212440 is a wasteful number, since it uses less digits than its factorization.

11541212440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288530322 (or 288530318 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

Adding to 11541212440 its reverse (4421214511), we get a palindrome (15962426951).

The spelling of 11541212440 in words is "eleven billion, five hundred forty-one million, two hundred twelve thousand, four hundred forty".