19485553022417 has 2 divisors, whose sum is σ = 19485553022418. Its totient is φ = 19485553022416.

The previous prime is 19485553022387. The next prime is 19485553022497. The reversal of 19485553022417 is 71422035558491.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17126429051281 + 2359123971136 = 4138409^2 + 1535944^2 .

It is a cyclic number.

It is not a de Polignac number, because 19485553022417 - 2²⁰ = 19485551973841 is a prime.

It is not a weakly prime, because it can be changed into another prime (19485553022497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9742776511208 + 9742776511209.

It is an arithmetic number, because the mean of its divisors is an integer number (9742776511209).

Almost surely, 2^{19485553022417} is an apocalyptic number.

It is an amenable number.

19485553022417 is a deficient number, since it is larger than the sum of its proper divisors (1).

19485553022417 is an equidigital number, since it uses as much as digits as its factorization.

19485553022417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096000, while the sum is 56.

The spelling of 19485553022417 in words is "nineteen trillion, four hundred eighty-five billion, five hundred fifty-three million, twenty-two thousand, four hundred seventeen".