1663705283809 has 2 divisors, whose sum is σ = 1663705283810. Its totient is φ = 1663705283808.

The previous prime is 1663705283803. The next prime is 1663705283833. The reversal of 1663705283809 is 9083825073661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1663705283409 + 400 = 1289847^2 + 20^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1663705283809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1663705283803) 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, 831852641904 + 831852641905.

It is an arithmetic number, because the mean of its divisors is an integer number (831852641905).

Almost surely, 2^{1663705283809} is an apocalyptic number.

It is an amenable number.

1663705283809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663705283809 is an equidigital number, since it uses as much as digits as its factorization.

1663705283809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13063680, while the sum is 58.

The spelling of 1663705283809 in words is "one trillion, six hundred sixty-three billion, seven hundred five million, two hundred eighty-three thousand, eight hundred nine".