6408444859 has 4 divisors (see below), whose sum is σ = 6419950704. Its totient is φ = 6396939016.

The previous prime is 6408444839. The next prime is 6408444871. The reversal of 6408444859 is 9584448046.

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 6408444859 - 2⁵ = 6408444827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6408444839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5752087 + ... + 5753200.

It is an arithmetic number, because the mean of its divisors is an integer number (1604987676).

Almost surely, 2^6408444859 is an apocalyptic number.

6408444859 is a deficient number, since it is larger than the sum of its proper divisors (11505845).

6408444859 is a wasteful number, since it uses less digits than its factorization.

6408444859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11505844.

The product of its (nonzero) digits is 4423680, while the sum is 52.

The square root of 6408444859 is about 80052.7629691818. The cubic root of 6408444859 is about 1857.4517904315.

The spelling of 6408444859 in words is "six billion, four hundred eight million, four hundred forty-four thousand, eight hundred fifty-nine".