6543442443449 has 2 divisors, whose sum is σ = 6543442443450. Its totient is φ = 6543442443448.

The previous prime is 6543442443389. The next prime is 6543442443497. The reversal of 6543442443449 is 9443442443456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3362338334224 + 3181104109225 = 1833668^2 + 1783565^2 .

It is a cyclic number.

It is not a de Polignac number, because 6543442443449 - 2²⁴ = 6543425666233 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6543442443394 and 6543442443403.

It is not a weakly prime, because it can be changed into another prime (6543442443049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3271721221724 + 3271721221725.

It is an arithmetic number, because the mean of its divisors is an integer number (3271721221725).

Almost surely, 2^{6543442443449} is an apocalyptic number.

It is an amenable number.

6543442443449 is a deficient number, since it is larger than the sum of its proper divisors (1).

6543442443449 is an equidigital number, since it uses as much as digits as its factorization.

6543442443449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79626240, while the sum is 56.

The spelling of 6543442443449 in words is "six trillion, five hundred forty-three billion, four hundred forty-two million, four hundred forty-three thousand, four hundred forty-nine".