6644442456 has 24 divisors (see below), whose sum is σ = 17995365180. Its totient is φ = 2214814128.

The previous prime is 6644442437. The next prime is 6644442491. The reversal of 6644442456 is 6542444466.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46141890 + ... + 46142033.

Almost surely, 2^6644442456 is an apocalyptic number.

It is an amenable number.

6644442456 is an abundant number, since it is smaller than the sum of its proper divisors (11350922724).

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

6644442456 is a wasteful number, since it uses less digits than its factorization.

6644442456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92283935 (or 92283928 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 45.

The square root of 6644442456 is about 81513.4495405513. The cubic root of 6644442456 is about 1879.9783511918.

It can be divided in two parts, 66444 and 42456, that added together give a square (108900 = 330²).

The spelling of 6644442456 in words is "six billion, six hundred forty-four million, four hundred forty-two thousand, four hundred fifty-six".