6544938399 has 16 divisors (see below), whose sum is σ = 9271492320. Its totient is φ = 4098971520.

The previous prime is 6544938377. The next prime is 6544938419. The reversal of 6544938399 is 9938394456.

It is not a de Polignac number, because 6544938399 - 2⁸ = 6544938143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6544938299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1013392 + ... + 1019829.

It is an arithmetic number, because the mean of its divisors is an integer number (579468270).

Almost surely, 2^6544938399 is an apocalyptic number.

6544938399 is a deficient number, since it is larger than the sum of its proper divisors (2726553921).

6544938399 is a wasteful number, since it uses less digits than its factorization.

6544938399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033290.

The product of its digits is 25194240, while the sum is 60.

The square root of 6544938399 is about 80900.7935622389. The cubic root of 6544938399 is about 1870.5465529485.

The spelling of 6544938399 in words is "six billion, five hundred forty-four million, nine hundred thirty-eight thousand, three hundred ninety-nine".