6384644361 has 18 divisors (see below), whose sum is σ = 9375976350. Its totient is φ = 4186630080.

The previous prime is 6384644341. The next prime is 6384644377. The reversal of 6384644361 is 1634464836.

It is a happy number.

6384644361 is a `hidden beast` number, since 638 + 4 + 6 + 4 + 4 + 3 + 6 + 1 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 909384336 + 5475260025 = 30156^2 + 73995^2 .

It is not a de Polignac number, because 6384644361 - 2⁶ = 6384644297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6384644341) 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 in 17 ways as a sum of consecutive naturals, for example, 61836 + ... + 128813.

It is an arithmetic number, because the mean of its divisors is an integer number (520887575).

Almost surely, 2^6384644361 is an apocalyptic number.

6384644361 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

6384644361 is a deficient number, since it is larger than the sum of its proper divisors (2991331989).

6384644361 is a wasteful number, since it uses less digits than its factorization.

6384644361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190777 (or 190713 counting only the distinct ones).

The product of its digits is 995328, while the sum is 45.

The square root of 6384644361 is about 79903.9696197880. The cubic root of 6384644361 is about 1855.1494575684.

The spelling of 6384644361 in words is "six billion, three hundred eighty-four million, six hundred forty-four thousand, three hundred sixty-one".