6444168737 has 2 divisors, whose sum is σ = 6444168738. Its totient is φ = 6444168736.

The previous prime is 6444168697. The next prime is 6444168739. The reversal of 6444168737 is 7378614446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6256177216 + 187991521 = 79096^2 + 13711^2 .

It is a cyclic number.

It is not a de Polignac number, because 6444168737 - 2¹² = 6444164641 is a prime.

Together with 6444168739, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6444168739) 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 as a sum of consecutive naturals, namely, 3222084368 + 3222084369.

It is an arithmetic number, because the mean of its divisors is an integer number (3222084369).

Almost surely, 2^6444168737 is an apocalyptic number.

It is an amenable number.

6444168737 is a deficient number, since it is larger than the sum of its proper divisors (1).

6444168737 is an equidigital number, since it uses as much as digits as its factorization.

6444168737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2709504, while the sum is 50.

The square root of 6444168737 is about 80275.5799543049. The cubic root of 6444168737 is about 1860.8968520485.

The spelling of 6444168737 in words is "six billion, four hundred forty-four million, one hundred sixty-eight thousand, seven hundred thirty-seven".