2173646463689 has 2 divisors, whose sum is σ = 2173646463690. Its totient is φ = 2173646463688.

The previous prime is 2173646463641. The next prime is 2173646463731. The reversal of 2173646463689 is 9863646463712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1695151920400 + 478494543289 = 1301980^2 + 691733^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2173646463689 is a prime.

It is not a weakly prime, because it can be changed into another prime (2173640463689) 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, 1086823231844 + 1086823231845.

It is an arithmetic number, because the mean of its divisors is an integer number (1086823231845).

Almost surely, 2^{2173646463689} is an apocalyptic number.

It is an amenable number.

2173646463689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2173646463689 is an equidigital number, since it uses as much as digits as its factorization.

2173646463689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188116992, while the sum is 65.

The spelling of 2173646463689 in words is "two trillion, one hundred seventy-three billion, six hundred forty-six million, four hundred sixty-three thousand, six hundred eighty-nine".