6444137217 has 32 divisors (see below), whose sum is σ = 10346139648. Its totient is φ = 3488037696.

The previous prime is 6444137213. The next prime is 6444137233. The reversal of 6444137217 is 7127314446.

6444137217 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6444137217 - 2² = 6444137213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6444137213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15018 + ... + 114515.

It is an arithmetic number, because the mean of its divisors is an integer number (323316864).

Almost surely, 2^6444137217 is an apocalyptic number.

It is an amenable number.

6444137217 is a deficient number, since it is larger than the sum of its proper divisors (3902002431).

6444137217 is a wasteful number, since it uses less digits than its factorization.

6444137217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129669.

The product of its digits is 112896, while the sum is 39.

The square root of 6444137217 is about 80275.3836303508. The cubic root of 6444137217 is about 1860.8938180102.

The spelling of 6444137217 in words is "six billion, four hundred forty-four million, one hundred thirty-seven thousand, two hundred seventeen".