4243660444643 has 4 divisors (see below), whose sum is σ = 4493287529640. Its totient is φ = 3994033359648.

The previous prime is 4243660444631. The next prime is 4243660444651. The reversal of 4243660444643 is 3464440663424.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 4243660444643 - 2⁴ = 4243660444627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4243660444591 and 4243660444600.

It is not an unprimeable number, because it can be changed into a prime (4243660443643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124813542473 + ... + 124813542506.

It is an arithmetic number, because the mean of its divisors is an integer number (1123321882410).

Almost surely, 2^{4243660444643} is an apocalyptic number.

4243660444643 is a deficient number, since it is larger than the sum of its proper divisors (249627084997).

4243660444643 is a wasteful number, since it uses less digits than its factorization.

4243660444643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249627084996.

The product of its (nonzero) digits is 15925248, while the sum is 50.

The spelling of 4243660444643 in words is "four trillion, two hundred forty-three billion, six hundred sixty million, four hundred forty-four thousand, six hundred forty-three".