8555442257 has 2 divisors, whose sum is σ = 8555442258. Its totient is φ = 8555442256.

The previous prime is 8555442209. The next prime is 8555442263. The reversal of 8555442257 is 7522445558.

8555442257 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7797596416 + 757845841 = 88304^2 + 27529^2 .

It is a cyclic number.

It is not a de Polignac number, because 8555442257 - 2⁶ = 8555442193 is a prime.

It is a super-2 number, since 2×8555442257² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8555442157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4277721128 + 4277721129.

It is an arithmetic number, because the mean of its divisors is an integer number (4277721129).

Almost surely, 2^8555442257 is an apocalyptic number.

It is an amenable number.

8555442257 is a deficient number, since it is larger than the sum of its proper divisors (1).

8555442257 is an equidigital number, since it uses as much as digits as its factorization.

8555442257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2240000, while the sum is 47.

The square root of 8555442257 is about 92495.6337185707. The cubic root of 8555442257 is about 2045.2551182489.

The spelling of 8555442257 in words is "eight billion, five hundred fifty-five million, four hundred forty-two thousand, two hundred fifty-seven".