11543520440 has 32 divisors (see below), whose sum is σ = 26398712160. Its totient is φ = 4541712000.

The previous prime is 11543520431. The next prime is 11543520449. The reversal of 11543520440 is 4402534511.

It is an interprime number because it is at equal distance from previous prime (11543520431) and next prime (11543520449).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11543520449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2363036 + ... + 2367915.

It is an arithmetic number, because the mean of its divisors is an integer number (824959755).

Almost surely, 2^11543520440 is an apocalyptic number.

11543520440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11543520440 is an abundant number, since it is smaller than the sum of its proper divisors (14855191720).

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

11543520440 is a wasteful number, since it uses less digits than its factorization.

11543520440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4731023 (or 4731019 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The spelling of 11543520440 in words is "eleven billion, five hundred forty-three million, five hundred twenty thousand, four hundred forty".