11543871841 has 4 divisors (see below), whose sum is σ = 11592172800. Its totient is φ = 11495570884.

The previous prime is 11543871839. The next prime is 11543871851. The reversal of 11543871841 is 14817834511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11543871841 - 2¹ = 11543871839 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11543871851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24150121 + ... + 24150598.

It is an arithmetic number, because the mean of its divisors is an integer number (2898043200).

Almost surely, 2^11543871841 is an apocalyptic number.

It is an amenable number.

11543871841 is a deficient number, since it is larger than the sum of its proper divisors (48300959).

11543871841 is an equidigital number, since it uses as much as digits as its factorization.

11543871841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48300958.

The product of its digits is 107520, while the sum is 43.

The spelling of 11543871841 in words is "eleven billion, five hundred forty-three million, eight hundred seventy-one thousand, eight hundred forty-one".