6404656379 has 8 divisors (see below), whose sum is σ = 7033791600. Its totient is φ = 5783336800.

The previous prime is 6404656373. The next prime is 6404656403. The reversal of 6404656379 is 9736564046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6404656379 - 2⁸ = 6404656123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6404656373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1952192 + ... + 1955469.

It is an arithmetic number, because the mean of its divisors is an integer number (879223950).

Almost surely, 2^6404656379 is an apocalyptic number.

6404656379 is a deficient number, since it is larger than the sum of its proper divisors (629135221).

6404656379 is a wasteful number, since it uses less digits than its factorization.

6404656379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3907821.

The product of its (nonzero) digits is 3265920, while the sum is 50.

The square root of 6404656379 is about 80029.0970772506. The cubic root of 6404656379 is about 1857.0856950558.

The spelling of 6404656379 in words is "six billion, four hundred four million, six hundred fifty-six thousand, three hundred seventy-nine".