43606665643 has 8 divisors (see below), whose sum is σ = 46184977440. Its totient is φ = 41029822080.

The previous prime is 43606665589. The next prime is 43606665667. The reversal of 43606665643 is 34656660634.

43606665643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 43606665643 - 2⁹ = 43606665131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43606665043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305608 + ... + 424981.

It is an arithmetic number, because the mean of its divisors is an integer number (5773122180).

Almost surely, 2^43606665643 is an apocalyptic number.

43606665643 is a deficient number, since it is larger than the sum of its proper divisors (2578311797).

43606665643 is a wasteful number, since it uses less digits than its factorization.

43606665643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734117.

The product of its (nonzero) digits is 5598720, while the sum is 49.

The spelling of 43606665643 in words is "forty-three billion, six hundred six million, six hundred sixty-five thousand, six hundred forty-three".