43611868243 has 4 divisors (see below), whose sum is σ = 43653364888. Its totient is φ = 43570371600.

The previous prime is 43611868151. The next prime is 43611868249. The reversal of 43611868243 is 34286811634.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43611868243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43611868193 and 43611868202.

It is not an unprimeable number, because it can be changed into a prime (43611868249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20746746 + ... + 20748847.

It is an arithmetic number, because the mean of its divisors is an integer number (10913341222).

Almost surely, 2^43611868243 is an apocalyptic number.

43611868243 is a deficient number, since it is larger than the sum of its proper divisors (41496645).

43611868243 is a wasteful number, since it uses less digits than its factorization.

43611868243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41496644.

The product of its digits is 663552, while the sum is 46.

The spelling of 43611868243 in words is "forty-three billion, six hundred eleven million, eight hundred sixty-eight thousand, two hundred forty-three".