6541439818013 has 2 divisors, whose sum is σ = 6541439818014. Its totient is φ = 6541439818012.

The previous prime is 6541439818007. The next prime is 6541439818021. The reversal of 6541439818013 is 3108189341456.

6541439818013 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5004826699609 + 1536613118404 = 2237147^2 + 1239602^2 .

It is a cyclic number.

It is not a de Polignac number, because 6541439818013 - 2⁶ = 6541439817949 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6541439818813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3270719909006 + 3270719909007.

It is an arithmetic number, because the mean of its divisors is an integer number (3270719909007).

Almost surely, 2^{6541439818013} is an apocalyptic number.

It is an amenable number.

6541439818013 is a deficient number, since it is larger than the sum of its proper divisors (1).

6541439818013 is an equidigital number, since it uses as much as digits as its factorization.

6541439818013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2488320, while the sum is 53.

The spelling of 6541439818013 in words is "six trillion, five hundred forty-one billion, four hundred thirty-nine million, eight hundred eighteen thousand, thirteen".