6384378409 has 4 divisors (see below), whose sum is σ = 6386962516. Its totient is φ = 6381794304.

The previous prime is 6384378383. The next prime is 6384378419. The reversal of 6384378409 is 9048734836.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4193857600 + 2190520809 = 64760^2 + 46803^2 .

It is a cyclic number.

It is not a de Polignac number, because 6384378409 - 2¹³ = 6384370217 is a prime.

It is a super-3 number, since 3×6384378409³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6384378419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1288344 + ... + 1293289.

It is an arithmetic number, because the mean of its divisors is an integer number (1596740629).

Almost surely, 2^6384378409 is an apocalyptic number.

It is an amenable number.

6384378409 is a deficient number, since it is larger than the sum of its proper divisors (2584107).

6384378409 is a wasteful number, since it uses less digits than its factorization.

6384378409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2584106.

The product of its (nonzero) digits is 3483648, while the sum is 52.

The square root of 6384378409 is about 79902.3054047879. The cubic root of 6384378409 is about 1855.1236984955.

The spelling of 6384378409 in words is "six billion, three hundred eighty-four million, three hundred seventy-eight thousand, four hundred nine".