225679166849 has 2 divisors, whose sum is σ = 225679166850. Its totient is φ = 225679166848.

The previous prime is 225679166837. The next prime is 225679166863. The reversal of 225679166849 is 948661976522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124598410225 + 101080756624 = 352985^2 + 317932^2 .

It is a cyclic number.

It is not a de Polignac number, because 225679166849 - 2²⁰ = 225678118273 is a prime.

It is not a weakly prime, because it can be changed into another prime (225679166899) 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, 112839583424 + 112839583425.

It is an arithmetic number, because the mean of its divisors is an integer number (112839583425).

Almost surely, 2^225679166849 is an apocalyptic number.

It is an amenable number.

225679166849 is a deficient number, since it is larger than the sum of its proper divisors (1).

225679166849 is an equidigital number, since it uses as much as digits as its factorization.

225679166849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78382080, while the sum is 65.

The spelling of 225679166849 in words is "two hundred twenty-five billion, six hundred seventy-nine million, one hundred sixty-six thousand, eight hundred forty-nine".