6490644655013 has 2 divisors, whose sum is σ = 6490644655014. Its totient is φ = 6490644655012.

The previous prime is 6490644654959. The next prime is 6490644655021. The reversal of 6490644655013 is 3105564460946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5622883472644 + 867761182369 = 2371262^2 + 931537^2 .

It is a cyclic number.

It is not a de Polignac number, because 6490644655013 - 2²⁰ = 6490643606437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6490644555013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3245322327506 + 3245322327507.

It is an arithmetic number, because the mean of its divisors is an integer number (3245322327507).

Almost surely, 2^{6490644655013} is an apocalyptic number.

It is an amenable number.

6490644655013 is a deficient number, since it is larger than the sum of its proper divisors (1).

6490644655013 is an equidigital number, since it uses as much as digits as its factorization.

6490644655013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9331200, while the sum is 53.

The spelling of 6490644655013 in words is "six trillion, four hundred ninety billion, six hundred forty-four million, six hundred fifty-five thousand, thirteen".