11566231443 has 48 divisors (see below), whose sum is σ = 18797163840. Its totient is φ = 6804000000.

The previous prime is 11566231423. The next prime is 11566231451. The reversal of 11566231443 is 34413266511.

11566231443 is a `hidden beast` number, since 1 + 15 + 6 + 623 + 14 + 4 + 3 = 666.

It is not a de Polignac number, because 11566231443 - 2²⁴ = 11549454227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11566231398 and 11566231407.

It is not an unprimeable number, because it can be changed into a prime (11566231423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 325818 + ... + 359568.

It is an arithmetic number, because the mean of its divisors is an integer number (391607580).

Almost surely, 2^11566231443 is an apocalyptic number.

11566231443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11566231443 is a deficient number, since it is larger than the sum of its proper divisors (7230932397).

11566231443 is a wasteful number, since it uses less digits than its factorization.

11566231443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33900 (or 33897 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

Adding to 11566231443 its reverse (34413266511), we get a palindrome (45979497954).

The spelling of 11566231443 in words is "eleven billion, five hundred sixty-six million, two hundred thirty-one thousand, four hundred forty-three".