6444395000 has 80 divisors (see below), whose sum is σ = 15325375560. Its totient is φ = 2539152000.

The previous prime is 6444394997. The next prime is 6444395021. The reversal of 6444395000 is 5934446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 325382 + ... + 344618.

Almost surely, 2^6444395000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6444395000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7662687780).

6444395000 is an abundant number, since it is smaller than the sum of its proper divisors (8880980560).

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

6444395000 is a wasteful number, since it uses less digits than its factorization.

6444395000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19330 (or 19311 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 6444395000 is about 80276.9892310368. The cubic root of 6444395000 is about 1860.9186312825.

The spelling of 6444395000 in words is "six billion, four hundred forty-four million, three hundred ninety-five thousand".