6516615938 has 24 divisors (see below), whose sum is σ = 11383858512. Its totient is φ = 2789635464.

The previous prime is 6516615907. The next prime is 6516615977. The reversal of 6516615938 is 8395166156.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48881 + ... + 124187.

It is an arithmetic number, because the mean of its divisors is an integer number (474327438).

Almost surely, 2^6516615938 is an apocalyptic number.

6516615938 is a deficient number, since it is larger than the sum of its proper divisors (4867242574).

6516615938 is a wasteful number, since it uses less digits than its factorization.

6516615938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76206 (or 76199 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 50.

The square root of 6516615938 is about 80725.5593848689. The cubic root of 6516615938 is about 1867.8444605212.

The spelling of 6516615938 in words is "six billion, five hundred sixteen million, six hundred fifteen thousand, nine hundred thirty-eight".