18559424044225 has 9 divisors (see below), whose sum is σ = 23013712524873. Its totient is φ = 14847522003120.

The previous prime is 18559424044211. The next prime is 18559424044237. The reversal of 18559424044225 is 52244042495581.

The square root of 18559424044225 is 4308065.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 6974495419329 + 11584928624896 = 2640927^2 + 3403664^2 .

It is not a de Polignac number, because 18559424044225 - 2¹⁷ = 18559423913153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 8 ways as a sum of consecutive naturals, for example, 21109519 + ... + 21971131.

Almost surely, 2^{18559424044225} is an apocalyptic number.

18559424044225 is the 4308065-th square number.

18559424044225 is the 2154033-rd centered octagonal number.

It is an amenable number.

18559424044225 is a deficient number, since it is larger than the sum of its proper divisors (4454288480648).

18559424044225 is an frugal number, since it uses more digits than its factorization.

18559424044225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723236 (or 861618 counting only the distinct ones).

The product of its (nonzero) digits is 18432000, while the sum is 55.

The spelling of 18559424044225 in words is "eighteen trillion, five hundred fifty-nine billion, four hundred twenty-four million, forty-four thousand, two hundred twenty-five".