4144021644 has 48 divisors (see below), whose sum is σ = 11058518016. Its totient is φ = 1183171200.

The previous prime is 4144021639. The next prime is 4144021663. The reversal of 4144021644 is 4461204414.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107749 + ... + 141059.

It is an arithmetic number, because the mean of its divisors is an integer number (230385792).

Almost surely, 2^4144021644 is an apocalyptic number.

It is an amenable number.

4144021644 is an abundant number, since it is smaller than the sum of its proper divisors (6914496372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4144021644 is a wasteful number, since it uses less digits than its factorization.

4144021644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34806 (or 34804 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

The square root of 4144021644 is about 64374.0758690950. The cubic root of 4144021644 is about 1606.2285400717.

The spelling of 4144021644 in words is "four billion, one hundred forty-four million, twenty-one thousand, six hundred forty-four".