6404807449 has 4 divisors (see below), whose sum is σ = 6412078260. Its totient is φ = 6397536640.

The previous prime is 6404807407. The next prime is 6404807459. The reversal of 6404807449 is 9447084046.

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 983136025 + 5421671424 = 31355^2 + 73632^2 .

It is a cyclic number.

It is not a de Polignac number, because 6404807449 - 2¹⁹ = 6404283161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6404807399 and 6404807408.

It is not an unprimeable number, because it can be changed into a prime (6404807459) 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, 3634084 + ... + 3635845.

It is an arithmetic number, because the mean of its divisors is an integer number (1603019565).

Almost surely, 2^6404807449 is an apocalyptic number.

It is an amenable number.

6404807449 is a deficient number, since it is larger than the sum of its proper divisors (7270811).

6404807449 is an equidigital number, since it uses as much as digits as its factorization.

6404807449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7270810.

The product of its (nonzero) digits is 774144, while the sum is 46.

The square root of 6404807449 is about 80030.0409158961. The cubic root of 6404807449 is about 1857.1002962934.

The spelling of 6404807449 in words is "six billion, four hundred four million, eight hundred seven thousand, four hundred forty-nine".