1563728171647 has 2 divisors, whose sum is σ = 1563728171648. Its totient is φ = 1563728171646.

The previous prime is 1563728171641. The next prime is 1563728171701. The reversal of 1563728171647 is 7461718273651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1563728171647 - 2¹⁹ = 1563727647359 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1563728171591 and 1563728171600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1563728171641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 781864085823 + 781864085824.

It is an arithmetic number, because the mean of its divisors is an integer number (781864085824).

Almost surely, 2^{1563728171647} is an apocalyptic number.

1563728171647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1563728171647 is an equidigital number, since it uses as much as digits as its factorization.

1563728171647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11854080, while the sum is 58.

The spelling of 1563728171647 in words is "one trillion, five hundred sixty-three billion, seven hundred twenty-eight million, one hundred seventy-one thousand, six hundred forty-seven".