6444168738 has 32 divisors (see below), whose sum is σ = 14738156160. Its totient is φ = 1840112640.

The previous prime is 6444168737. The next prime is 6444168739. The reversal of 6444168738 is 8378614446.

It is an interprime number because it is at equal distance from previous prime (6444168737) and next prime (6444168739).

It is not an unprimeable number, because it can be changed into a prime (6444168737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29058 + ... + 117186.

It is an arithmetic number, because the mean of its divisors is an integer number (460567380).

Almost surely, 2^6444168738 is an apocalyptic number.

6444168738 is an abundant number, since it is smaller than the sum of its proper divisors (8293987422).

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

6444168738 is a wasteful number, since it uses less digits than its factorization.

6444168738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89882.

The product of its digits is 3096576, while the sum is 51.

The square root of 6444168738 is about 80275.5799605335. The cubic root of 6444168738 is about 1860.8968521448.

The spelling of 6444168738 in words is "six billion, four hundred forty-four million, one hundred sixty-eight thousand, seven hundred thirty-eight".