11531044043543 has 4 divisors (see below), whose sum is σ = 11532394765920. Its totient is φ = 11529693321168.

The previous prime is 11531044043539. The next prime is 11531044043569. The reversal of 11531044043543 is 34534044013511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11531044043543 - 2² = 11531044043539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11531044043497 and 11531044043506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11531044043243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 675348383 + ... + 675365456.

It is an arithmetic number, because the mean of its divisors is an integer number (2883098691480).

Almost surely, 2^{11531044043543} is an apocalyptic number.

11531044043543 is a deficient number, since it is larger than the sum of its proper divisors (1350722377).

11531044043543 is an equidigital number, since it uses as much as digits as its factorization.

11531044043543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350722376.

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 11531044043543 in words is "eleven trillion, five hundred thirty-one billion, forty-four million, forty-three thousand, five hundred forty-three".