28349368344449 has 2 divisors, whose sum is σ = 28349368344450. Its totient is φ = 28349368344448.

The previous prime is 28349368344439. The next prime is 28349368344463. The reversal of 28349368344449 is 94444386394382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19184338680049 + 9165029664400 = 4379993^2 + 3027380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28349368344449 is a prime.

It is a super-2 number, since 2×28349368344449² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28349368344439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14174684172224 + 14174684172225.

It is an arithmetic number, because the mean of its divisors is an integer number (14174684172225).

Almost surely, 2^{28349368344449} is an apocalyptic number.

It is an amenable number.

28349368344449 is a deficient number, since it is larger than the sum of its proper divisors (1).

28349368344449 is an equidigital number, since it uses as much as digits as its factorization.

28349368344449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1719926784, while the sum is 71.

The spelling of 28349368344449 in words is "twenty-eight trillion, three hundred forty-nine billion, three hundred sixty-eight million, three hundred forty-four thousand, four hundred forty-nine".