2166223404089 has 2 divisors, whose sum is σ = 2166223404090. Its totient is φ = 2166223404088.

The previous prime is 2166223403969. The next prime is 2166223404139. The reversal of 2166223404089 is 9804043226612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1519056250000 + 647167154089 = 1232500^2 + 804467^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2166223404089 is a prime.

It is not a weakly prime, because it can be changed into another prime (2166223404589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083111702044 + 1083111702045.

It is an arithmetic number, because the mean of its divisors is an integer number (1083111702045).

Almost surely, 2^{2166223404089} is an apocalyptic number.

It is an amenable number.

2166223404089 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166223404089 is an equidigital number, since it uses as much as digits as its factorization.

2166223404089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 995328, while the sum is 47.

The spelling of 2166223404089 in words is "two trillion, one hundred sixty-six billion, two hundred twenty-three million, four hundred four thousand, eighty-nine".