6439217604 has 12 divisors (see below), whose sum is σ = 15024841104. Its totient is φ = 2146405864.

The previous prime is 6439217593. The next prime is 6439217611. The reversal of 6439217604 is 4067129346.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268300722 + ... + 268300745.

It is an arithmetic number, because the mean of its divisors is an integer number (1252070092).

Almost surely, 2^6439217604 is an apocalyptic number.

It is an amenable number.

6439217604 is an abundant number, since it is smaller than the sum of its proper divisors (8585623500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6439217604 is a wasteful number, since it uses less digits than its factorization.

6439217604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536601474 (or 536601472 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 6439217604 is about 80244.7356778001. The cubic root of 6439217604 is about 1860.4201467343.

The spelling of 6439217604 in words is "six billion, four hundred thirty-nine million, two hundred seventeen thousand, six hundred four".