6404064004 has 24 divisors (see below), whose sum is σ = 12072296600. Its totient is φ = 2954962944.

The previous prime is 6404063993. The next prime is 6404064013. The reversal of 6404064004 is 4004604046.

It can be written as a sum of positive squares in 4 ways, for example, as 632623104 + 5771440900 = 25152^2 + 75970^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223012 + ... + 250084.

Almost surely, 2^6404064004 is an apocalyptic number.

It is an amenable number.

6404064004 is a deficient number, since it is larger than the sum of its proper divisors (5668232596).

6404064004 is a wasteful number, since it uses less digits than its factorization.

6404064004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31639 (or 31637 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 6404064004 is about 80025.3959940218. The cubic root of 6404064004 is about 1857.0284385332.

The spelling of 6404064004 in words is "six billion, four hundred four million, sixty-four thousand, four".