6444168746 has 8 divisors (see below), whose sum is σ = 9751795524. Its totient is φ = 3193570240.

The previous prime is 6444168739. The next prime is 6444168749. The reversal of 6444168746 is 6478614446.

It can be written as a sum of positive squares in 2 ways, for example, as 4552875625 + 1891293121 = 67475^2 + 43489^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 6444168694 and 6444168703.

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 3 ways as a sum of consecutive naturals, for example, 14256785 + ... + 14257236.

Almost surely, 2^6444168746 is an apocalyptic number.

6444168746 is a deficient number, since it is larger than the sum of its proper divisors (3307626778).

6444168746 is a wasteful number, since it uses less digits than its factorization.

6444168746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28514136.

The product of its digits is 3096576, while the sum is 50.

The square root of 6444168746 is about 80275.5800103618. The cubic root of 6444168746 is about 1860.8968529149.

The spelling of 6444168746 in words is "six billion, four hundred forty-four million, one hundred sixty-eight thousand, seven hundred forty-six".