6541439817967 has 2 divisors, whose sum is σ = 6541439817968. Its totient is φ = 6541439817966.

The previous prime is 6541439817949. The next prime is 6541439818007. The reversal of 6541439817967 is 7697189341456.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6541439817967 - 2³¹ = 6539292334319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6541439817896 and 6541439817905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6541439817167) 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, 3270719908983 + 3270719908984.

It is an arithmetic number, because the mean of its divisors is an integer number (3270719908984).

Almost surely, 2^{6541439817967} is an apocalyptic number.

6541439817967 is a deficient number, since it is larger than the sum of its proper divisors (1).

6541439817967 is an equidigital number, since it uses as much as digits as its factorization.

6541439817967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 274337280, while the sum is 70.

The spelling of 6541439817967 in words is "six trillion, five hundred forty-one billion, four hundred thirty-nine million, eight hundred seventeen thousand, nine hundred sixty-seven".