6489794845517 has 4 divisors (see below), whose sum is σ = 6489886921596. Its totient is φ = 6489702769440.

The previous prime is 6489794845487. The next prime is 6489794845549. The reversal of 6489794845517 is 7155484979846.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5308282368841 + 1181512476676 = 2303971^2 + 1086974^2 .

It is a cyclic number.

It is not a de Polignac number, because 6489794845517 - 2¹⁰ = 6489794844493 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 (6489794844517) 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, 45932234 + ... + 46073307.

It is an arithmetic number, because the mean of its divisors is an integer number (1622471730399).

Almost surely, 2^{6489794845517} is an apocalyptic number.

It is an amenable number.

6489794845517 is a deficient number, since it is larger than the sum of its proper divisors (92076079).

6489794845517 is an equidigital number, since it uses as much as digits as its factorization.

6489794845517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92076078.

The product of its digits is 2438553600, while the sum is 77.

The spelling of 6489794845517 in words is "six trillion, four hundred eighty-nine billion, seven hundred ninety-four million, eight hundred forty-five thousand, five hundred seventeen".