6444168747 has 4 divisors (see below), whose sum is σ = 8592225000. Its totient is φ = 4296112496.

The previous prime is 6444168739. The next prime is 6444168749. The reversal of 6444168747 is 7478614446.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6444168747 - 2³ = 6444168739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6444168747.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1074028122 + ... + 1074028127.

It is an arithmetic number, because the mean of its divisors is an integer number (2148056250).

Almost surely, 2^6444168747 is an apocalyptic number.

6444168747 is a deficient number, since it is larger than the sum of its proper divisors (2148056253).

6444168747 is a wasteful number, since it uses less digits than its factorization.

6444168747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2148056252.

The product of its digits is 3612672, while the sum is 51.

The square root of 6444168747 is about 80275.5800165904. The cubic root of 6444168747 is about 1860.8968530111.

The spelling of 6444168747 in words is "six billion, four hundred forty-four million, one hundred sixty-eight thousand, seven hundred forty-seven".