6489794844493 has 2 divisors, whose sum is σ = 6489794844494. Its totient is φ = 6489794844492.

The previous prime is 6489794844361. The next prime is 6489794844499. The reversal of 6489794844493 is 3944484979846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6489338466724 + 456377769 = 2547418^2 + 21363^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6489794844493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6489794844499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3244897422246 + 3244897422247.

It is an arithmetic number, because the mean of its divisors is an integer number (3244897422247).

Almost surely, 2^{6489794844493} is an apocalyptic number.

It is an amenable number.

6489794844493 is a deficient number, since it is larger than the sum of its proper divisors (1).

6489794844493 is an equidigital number, since it uses as much as digits as its factorization.

6489794844493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6019743744, while the sum is 79.

The spelling of 6489794844493 in words is "six trillion, four hundred eighty-nine billion, seven hundred ninety-four million, eight hundred forty-four thousand, four hundred ninety-three".