6404039464 has 16 divisors (see below), whose sum is σ = 12172062420. Its totient is φ = 3158156160.

The previous prime is 6404039461. The next prime is 6404039501. The reversal of 6404039464 is 4649304046.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5736850564 + 667188900 = 75742^2 + 25830^2 .

It is not an unprimeable number, because it can be changed into a prime (6404039461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5482327 + ... + 5483494.

Almost surely, 2^6404039464 is an apocalyptic number.

It is an amenable number.

6404039464 is a deficient number, since it is larger than the sum of its proper divisors (5768022956).

6404039464 is a wasteful number, since it uses less digits than its factorization.

6404039464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10965900 (or 10965896 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 40.

The square root of 6404039464 is about 80025.2426675483. The cubic root of 6404039464 is about 1857.0260665220.

The spelling of 6404039464 in words is "six billion, four hundred four million, thirty-nine thousand, four hundred sixty-four".