11543540520 has 32 divisors (see below), whose sum is σ = 34630621920. Its totient is φ = 3078277440.

The previous prime is 11543540479. The next prime is 11543540557. The reversal of 11543540520 is 2504534511.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 48097966 + ... + 48098205.

It is an arithmetic number, because the mean of its divisors is an integer number (1082206935).

Almost surely, 2^11543540520 is an apocalyptic number.

11543540520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11543540520 is an abundant number, since it is smaller than the sum of its proper divisors (23087081400).

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

11543540520 is a wasteful number, since it uses less digits than its factorization.

11543540520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96196185 (or 96196181 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 11543540520 in words is "eleven billion, five hundred forty-three million, five hundred forty thousand, five hundred twenty".