2285505185681 has 2 divisors, whose sum is σ = 2285505185682. Its totient is φ = 2285505185680.

The previous prime is 2285505185669. The next prime is 2285505185737. The reversal of 2285505185681 is 1865815055822.

It is a happy number.

It is an a-pointer prime, because the next prime (2285505185737) can be obtained adding 2285505185681 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2034163390081 + 251341795600 = 1426241^2 + 501340^2 .

It is a cyclic number.

It is not a de Polignac number, because 2285505185681 - 2³⁰ = 2284431443857 is a prime.

It is a super-2 number, since 2×2285505185681² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2285505185081) 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, 1142752592840 + 1142752592841.

It is an arithmetic number, because the mean of its divisors is an integer number (1142752592841).

Almost surely, 2^{2285505185681} is an apocalyptic number.

It is an amenable number.

2285505185681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2285505185681 is an equidigital number, since it uses as much as digits as its factorization.

2285505185681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680000, while the sum is 56.

The spelling of 2285505185681 in words is "two trillion, two hundred eighty-five billion, five hundred five million, one hundred eighty-five thousand, six hundred eighty-one".