6543773449 has 2 divisors, whose sum is σ = 6543773450. Its totient is φ = 6543773448.

The previous prime is 6543773441. The next prime is 6543773513. The reversal of 6543773449 is 9443773456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5405925625 + 1137847824 = 73525^2 + 33732^2 .

It is a cyclic number.

It is not a de Polignac number, because 6543773449 - 2³ = 6543773441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6543773396 and 6543773405.

It is not a weakly prime, because it can be changed into another prime (6543773441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3271886724 + 3271886725.

It is an arithmetic number, because the mean of its divisors is an integer number (3271886725).

Almost surely, 2^6543773449 is an apocalyptic number.

It is an amenable number.

6543773449 is a deficient number, since it is larger than the sum of its proper divisors (1).

6543773449 is an equidigital number, since it uses as much as digits as its factorization.

6543773449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7620480, while the sum is 52.

The square root of 6543773449 is about 80893.5933742592. The cubic root of 6543773449 is about 1870.4355652725.

The spelling of 6543773449 in words is "six billion, five hundred forty-three million, seven hundred seventy-three thousand, four hundred forty-nine".