2805766361 has 2 divisors, whose sum is σ = 2805766362. Its totient is φ = 2805766360.

The previous prime is 2805766349. The next prime is 2805766387. The reversal of 2805766361 is 1636675082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2625025225 + 180741136 = 51235^2 + 13444^2 .

It is a cyclic number.

It is not a de Polignac number, because 2805766361 - 2¹⁰ = 2805765337 is a prime.

It is not a weakly prime, because it can be changed into another prime (2805766331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1402883180 + 1402883181.

It is an arithmetic number, because the mean of its divisors is an integer number (1402883181).

Almost surely, 2^2805766361 is an apocalyptic number.

It is an amenable number.

2805766361 is a deficient number, since it is larger than the sum of its proper divisors (1).

2805766361 is an equidigital number, since it uses as much as digits as its factorization.

2805766361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 2805766361 is about 52969.4851872283. The cubic root of 2805766361 is about 1410.4266369870.

The spelling of 2805766361 in words is "two billion, eight hundred five million, seven hundred sixty-six thousand, three hundred sixty-one".