2161766724193 has 2 divisors, whose sum is σ = 2161766724194. Its totient is φ = 2161766724192.

The previous prime is 2161766724191. The next prime is 2161766724223. The reversal of 2161766724193 is 3914276671612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1295028068049 + 866738656144 = 1137993^2 + 930988^2 .

It is a cyclic number.

It is not a de Polignac number, because 2161766724193 - 2¹ = 2161766724191 is a prime.

Together with 2161766724191, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2161766724191) 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, 1080883362096 + 1080883362097.

It is an arithmetic number, because the mean of its divisors is an integer number (1080883362097).

Almost surely, 2^{2161766724193} is an apocalyptic number.

It is an amenable number.

2161766724193 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161766724193 is an equidigital number, since it uses as much as digits as its factorization.

2161766724193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4572288, while the sum is 55.

The spelling of 2161766724193 in words is "two trillion, one hundred sixty-one billion, seven hundred sixty-six million, seven hundred twenty-four thousand, one hundred ninety-three".