11543049520 has 80 divisors (see below), whose sum is σ = 27418298688. Its totient is φ = 4518097920.

The previous prime is 11543049509. The next prime is 11543049523. The reversal of 11543049520 is 2594034511.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (11543049523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 955357 + ... + 967363.

Almost surely, 2^11543049520 is an apocalyptic number.

11543049520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11543049520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13709149344).

11543049520 is an abundant number, since it is smaller than the sum of its proper divisors (15875249168).

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

11543049520 is a wasteful number, since it uses less digits than its factorization.

11543049520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12278 (or 12272 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 11543049520 in words is "eleven billion, five hundred forty-three million, forty-nine thousand, five hundred twenty".