43811868673 has 4 divisors (see below), whose sum is σ = 44074215360. Its totient is φ = 43549521988.

The previous prime is 43811868647. The next prime is 43811868677. The reversal of 43811868673 is 37686811834.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43811868673 - 2²¹ = 43809771521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43811868677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131173093 + ... + 131173426.

It is an arithmetic number, because the mean of its divisors is an integer number (11018553840).

Almost surely, 2^43811868673 is an apocalyptic number.

It is an amenable number.

43811868673 is a deficient number, since it is larger than the sum of its proper divisors (262346687).

43811868673 is a wasteful number, since it uses less digits than its factorization.

43811868673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262346686.

The product of its digits is 4644864, while the sum is 55.

The spelling of 43811868673 in words is "forty-three billion, eight hundred eleven million, eight hundred sixty-eight thousand, six hundred seventy-three".