6444789623 has 2 divisors, whose sum is σ = 6444789624. Its totient is φ = 6444789622.

The previous prime is 6444789613. The next prime is 6444789649. The reversal of 6444789623 is 3269874446.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6444789623 - 2⁸ = 6444789367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6444789613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3222394811 + 3222394812.

It is an arithmetic number, because the mean of its divisors is an integer number (3222394812).

Almost surely, 2^6444789623 is an apocalyptic number.

6444789623 is a deficient number, since it is larger than the sum of its proper divisors (1).

6444789623 is an equidigital number, since it uses as much as digits as its factorization.

6444789623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6967296, while the sum is 53.

The square root of 6444789623 is about 80279.4470770695. The cubic root of 6444789623 is about 1860.9566150035.

The spelling of 6444789623 in words is "six billion, four hundred forty-four million, seven hundred eighty-nine thousand, six hundred twenty-three".