6444168745 has 8 divisors (see below), whose sum is σ = 8837717184. Its totient is φ = 4418858544.

The previous prime is 6444168739. The next prime is 6444168749. The reversal of 6444168745 is 5478614446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6444168745 - 2³ = 6444168737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6444168749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92059519 + ... + 92059588.

It is an arithmetic number, because the mean of its divisors is an integer number (1104714648).

Almost surely, 2^6444168745 is an apocalyptic number.

It is an amenable number.

6444168745 is a deficient number, since it is larger than the sum of its proper divisors (2393548439).

6444168745 is a wasteful number, since it uses less digits than its factorization.

6444168745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184119119.

The product of its digits is 2580480, while the sum is 49.

The square root of 6444168745 is about 80275.5800041333. The cubic root of 6444168745 is about 1860.8968528186.

The spelling of 6444168745 in words is "six billion, four hundred forty-four million, one hundred sixty-eight thousand, seven hundred forty-five".