43668881545 has 8 divisors (see below), whose sum is σ = 52422882696. Its totient is φ = 34921622016.

The previous prime is 43668881521. The next prime is 43668881567. The reversal of 43668881545 is 54518886634.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2704 + 43668878841 = 52^2 + 208971^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43668881545 - 2⁵ = 43668881513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43668881545.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1671142 + ... + 1697071.

It is an arithmetic number, because the mean of its divisors is an integer number (6552860337).

Almost surely, 2^43668881545 is an apocalyptic number.

It is an amenable number.

43668881545 is a deficient number, since it is larger than the sum of its proper divisors (8754001151).

43668881545 is a wasteful number, since it uses less digits than its factorization.

43668881545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3370811.

The product of its digits is 22118400, while the sum is 58.

The spelling of 43668881545 in words is "forty-three billion, six hundred sixty-eight million, eight hundred eighty-one thousand, five hundred forty-five".