11471911543 has 4 divisors (see below), whose sum is σ = 11483727048. Its totient is φ = 11460096040.

The previous prime is 11471911541. The next prime is 11471911571. The reversal of 11471911543 is 34511917411.

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 11471911543 - 2¹ = 11471911541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11471911541) 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, 5906296 + ... + 5908237.

It is an arithmetic number, because the mean of its divisors is an integer number (2870931762).

Almost surely, 2^11471911543 is an apocalyptic number.

11471911543 is a deficient number, since it is larger than the sum of its proper divisors (11815505).

11471911543 is an equidigital number, since it uses as much as digits as its factorization.

11471911543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11815504.

The product of its digits is 15120, while the sum is 37.

The spelling of 11471911543 in words is "eleven billion, four hundred seventy-one million, nine hundred eleven thousand, five hundred forty-three".