6515246813 has 4 divisors (see below), whose sum is σ = 6858154560. Its totient is φ = 6172339068.

The previous prime is 6515246791. The next prime is 6515246849. The reversal of 6515246813 is 3186425156.

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 a de Polignac number, because none of the positive numbers 2^k-6515246813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6515240813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171453845 + ... + 171453882.

It is an arithmetic number, because the mean of its divisors is an integer number (1714538640).

Almost surely, 2^6515246813 is an apocalyptic number.

It is an amenable number.

6515246813 is a deficient number, since it is larger than the sum of its proper divisors (342907747).

6515246813 is a wasteful number, since it uses less digits than its factorization.

6515246813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342907746.

The product of its digits is 172800, while the sum is 41.

The square root of 6515246813 is about 80717.0788185499. The cubic root of 6515246813 is about 1867.7136415149.

The spelling of 6515246813 in words is "six billion, five hundred fifteen million, two hundred forty-six thousand, eight hundred thirteen".