6444635344 has 40 divisors (see below), whose sum is σ = 14274030848. Its totient is φ = 2761257600.

The previous prime is 6444635333. The next prime is 6444635357. The reversal of 6444635344 is 4435364446.

It is a self number, because there is not a number n which added to its sum of digits gives 6444635344.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 806569 + ... + 814519.

Almost surely, 2^6444635344 is an apocalyptic number.

It is an amenable number.

6444635344 is an abundant number, since it is smaller than the sum of its proper divisors (7829395504).

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

6444635344 is a wasteful number, since it uses less digits than its factorization.

6444635344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15203 (or 15197 counting only the distinct ones).

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

The square root of 6444635344 is about 80278.4861840331. The cubic root of 6444635344 is about 1860.9417653428.

The spelling of 6444635344 in words is "six billion, four hundred forty-four million, six hundred thirty-five thousand, three hundred forty-four".