6780328517 has 4 divisors (see below), whose sum is σ = 6780512256. Its totient is φ = 6780144780.

The previous prime is 6780328483. The next prime is 6780328519. The reversal of 6780328517 is 7158230876.

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 6780328517 - 2¹⁶ = 6780262981 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 (6780328519) 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, 15173 + ... + 117434.

It is an arithmetic number, because the mean of its divisors is an integer number (1695128064).

Almost surely, 2^6780328517 is an apocalyptic number.

It is an amenable number.

6780328517 is a deficient number, since it is larger than the sum of its proper divisors (183739).

6780328517 is a wasteful number, since it uses less digits than its factorization.

6780328517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183738.

The product of its (nonzero) digits is 564480, while the sum is 47.

The square root of 6780328517 is about 82342.7502394716. The cubic root of 6780328517 is about 1892.7078303843.

The spelling of 6780328517 in words is "six billion, seven hundred eighty million, three hundred twenty-eight thousand, five hundred seventeen".