228666852569 has 2 divisors, whose sum is σ = 228666852570. Its totient is φ = 228666852568.

The previous prime is 228666852563. The next prime is 228666852599. The reversal of 228666852569 is 965258666822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211912915600 + 16753936969 = 460340^2 + 129437^2 .

It is a cyclic number.

It is not a de Polignac number, because 228666852569 - 2⁸ = 228666852313 is a prime.

It is a super-2 number, since 2×228666852569² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (228666852563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114333426284 + 114333426285.

It is an arithmetic number, because the mean of its divisors is an integer number (114333426285).

Almost surely, 2^228666852569 is an apocalyptic number.

It is an amenable number.

228666852569 is a deficient number, since it is larger than the sum of its proper divisors (1).

228666852569 is an equidigital number, since it uses as much as digits as its factorization.

228666852569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 149299200, while the sum is 65.

The spelling of 228666852569 in words is "two hundred twenty-eight billion, six hundred sixty-six million, eight hundred fifty-two thousand, five hundred sixty-nine".