2705421773209 has 2 divisors, whose sum is σ = 2705421773210. Its totient is φ = 2705421773208.

The previous prime is 2705421773177. The next prime is 2705421773231. The reversal of 2705421773209 is 9023771245072.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2693816451225 + 11605321984 = 1641285^2 + 107728^2 .

It is a cyclic number.

It is not a de Polignac number, because 2705421773209 - 2⁵ = 2705421773177 is a prime.

It is not a weakly prime, because it can be changed into another prime (2705421773239) 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, 1352710886604 + 1352710886605.

It is an arithmetic number, because the mean of its divisors is an integer number (1352710886605).

Almost surely, 2^{2705421773209} is an apocalyptic number.

It is an amenable number.

2705421773209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2705421773209 is an equidigital number, since it uses as much as digits as its factorization.

2705421773209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1481760, while the sum is 49.

The spelling of 2705421773209 in words is "two trillion, seven hundred five billion, four hundred twenty-one million, seven hundred seventy-three thousand, two hundred nine".