6516148817 has 4 divisors (see below), whose sum is σ = 6537101376. Its totient is φ = 6495196260.

The previous prime is 6516148789. The next prime is 6516148853. The reversal of 6516148817 is 7188416156.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6516148817 - 2¹⁴ = 6516132433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6516148897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10475813 + ... + 10476434.

It is an arithmetic number, because the mean of its divisors is an integer number (1634275344).

Almost surely, 2^6516148817 is an apocalyptic number.

It is an amenable number.

6516148817 is a deficient number, since it is larger than the sum of its proper divisors (20952559).

6516148817 is a wasteful number, since it uses less digits than its factorization.

6516148817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20952558.

The product of its digits is 322560, while the sum is 47.

The square root of 6516148817 is about 80722.6660672205. Note that the first 3 decimals coincide. The cubic root of 6516148817 is about 1867.7998294719.

The spelling of 6516148817 in words is "six billion, five hundred sixteen million, one hundred forty-eight thousand, eight hundred seventeen".