4443536644 has 12 divisors (see below), whose sum is σ = 7776747468. Its totient is φ = 2221608800.

The previous prime is 4443536639. The next prime is 4443536689. The reversal of 4443536644 is 4466353444.

It can be written as a sum of positive squares in 2 ways, for example, as 2296326400 + 2147210244 = 47920^2 + 46338^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 4443536644.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41034 + ... + 102814.

It is an arithmetic number, because the mean of its divisors is an integer number (648062289).

Almost surely, 2^4443536644 is an apocalyptic number.

It is an amenable number.

4443536644 is a deficient number, since it is larger than the sum of its proper divisors (3333210824).

4443536644 is a wasteful number, since it uses less digits than its factorization.

4443536644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79766 (or 79764 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 43.

The square root of 4443536644 is about 66659.8578156299. The cubic root of 4443536644 is about 1644.0294338437.

The spelling of 4443536644 in words is "four billion, four hundred forty-three million, five hundred thirty-six thousand, six hundred forty-four".