11644368543 has 16 divisors (see below), whose sum is σ = 17252591200. Its totient is φ = 7762158720.

The previous prime is 11644368523. The next prime is 11644368563. The reversal of 11644368543 is 34586344611.

11644368543 is a `hidden beast` number, since 1 + 1 + 6 + 4 + 43 + 68 + 543 = 666.

It is an interprime number because it is at equal distance from previous prime (11644368523) and next prime (11644368563).

It is not a de Polignac number, because 11644368543 - 2¹⁰ = 11644367519 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 (11644368523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 482013 + ... + 505593.

It is an arithmetic number, because the mean of its divisors is an integer number (1078286950).

Almost surely, 2^11644368543 is an apocalyptic number.

11644368543 is a deficient number, since it is larger than the sum of its proper divisors (5608222657).

11644368543 is a wasteful number, since it uses less digits than its factorization.

11644368543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41879 (or 41873 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The spelling of 11644368543 in words is "eleven billion, six hundred forty-four million, three hundred sixty-eight thousand, five hundred forty-three".