6517397872 has 10 divisors (see below), whose sum is σ = 12627458408. Its totient is φ = 3258698928.

The previous prime is 6517397849. The next prime is 6517397891. The reversal of 6517397872 is 2787937156.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203668668 + ... + 203668699.

Almost surely, 2^6517397872 is an apocalyptic number.

It is an amenable number.

6517397872 is a deficient number, since it is larger than the sum of its proper divisors (6110060536).

6517397872 is a wasteful number, since it uses less digits than its factorization.

6517397872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407337375 (or 407337369 counting only the distinct ones).

The product of its digits is 4445280, while the sum is 55.

The square root of 6517397872 is about 80730.4024020691. The cubic root of 6517397872 is about 1867.9191655875.

The spelling of 6517397872 in words is "six billion, five hundred seventeen million, three hundred ninety-seven thousand, eight hundred seventy-two".