4443536643 has 64 divisors (see below), whose sum is σ = 7461522432. Its totient is φ = 2289876480.

The previous prime is 4443536639. The next prime is 4443536689. The reversal of 4443536643 is 3466353444.

It is a happy number.

It is not a de Polignac number, because 4443536643 - 2² = 4443536639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4443536595 and 4443536604.

It is not an unprimeable number, because it can be changed into a prime (4443536843) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2713621 + ... + 2715257.

It is an arithmetic number, because the mean of its divisors is an integer number (116586288).

Almost surely, 2^4443536643 is an apocalyptic number.

4443536643 is a deficient number, since it is larger than the sum of its proper divisors (3017985789).

4443536643 is a wasteful number, since it uses less digits than its factorization.

4443536643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884.

The product of its digits is 1244160, while the sum is 42.

The square root of 4443536643 is about 66659.8578081292. The cubic root of 4443536643 is about 1644.0294337204.

The spelling of 4443536643 in words is "four billion, four hundred forty-three million, five hundred thirty-six thousand, six hundred forty-three".