11808538443 has 12 divisors (see below), whose sum is σ = 18368837760. Its totient is φ = 7266792816.

The previous prime is 11808538369. The next prime is 11808538471. The reversal of 11808538443 is 34483580811.

It is not a de Polignac number, because 11808538443 - 2²⁴ = 11791761227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11808538843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50463723 + ... + 50463956.

It is an arithmetic number, because the mean of its divisors is an integer number (1530736480).

Almost surely, 2^11808538443 is an apocalyptic number.

11808538443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11808538443 is a deficient number, since it is larger than the sum of its proper divisors (6560299317).

11808538443 is a wasteful number, since it uses less digits than its factorization.

11808538443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100927698 (or 100927695 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The spelling of 11808538443 in words is "eleven billion, eight hundred eight million, five hundred thirty-eight thousand, four hundred forty-three".