19385910360449 has 2 divisors, whose sum is σ = 19385910360450. Its totient is φ = 19385910360448.

The previous prime is 19385910360277. The next prime is 19385910360463. The reversal of 19385910360449 is 94406301958391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19256799498049 + 129110862400 = 4388257^2 + 359320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19385910360449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19385910360391 and 19385910360400.

It is not a weakly prime, because it can be changed into another prime (19385910360469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9692955180224 + 9692955180225.

It is an arithmetic number, because the mean of its divisors is an integer number (9692955180225).

Almost surely, 2^{19385910360449} is an apocalyptic number.

It is an amenable number.

19385910360449 is a deficient number, since it is larger than the sum of its proper divisors (1).

19385910360449 is an equidigital number, since it uses as much as digits as its factorization.

19385910360449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25194240, while the sum is 62.

The spelling of 19385910360449 in words is "nineteen trillion, three hundred eighty-five billion, nine hundred ten million, three hundred sixty thousand, four hundred forty-nine".