6390475449 has 16 divisors (see below), whose sum is σ = 8570016000. Its totient is φ = 4235684096.

The previous prime is 6390475381. The next prime is 6390475451. The reversal of 6390475449 is 9445740936.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6390475449 - 2¹⁷ = 6390344377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6390475489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 461377 + ... + 475025.

It is an arithmetic number, because the mean of its divisors is an integer number (535626000).

Almost surely, 2^6390475449 is an apocalyptic number.

It is an amenable number.

6390475449 is a deficient number, since it is larger than the sum of its proper divisors (2179540551).

6390475449 is a wasteful number, since it uses less digits than its factorization.

6390475449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14544.

The product of its (nonzero) digits is 3265920, while the sum is 51.

The square root of 6390475449 is about 79940.4493920318. The cubic root of 6390475449 is about 1855.7140543094.

The spelling of 6390475449 in words is "six billion, three hundred ninety million, four hundred seventy-five thousand, four hundred forty-nine".