18068663025625 has 15 divisors (see below), whose sum is σ = 22578734110251. Its totient is φ = 14454845406000.

The previous prime is 18068663025617. The next prime is 18068663025649. The reversal of 18068663025625 is 52652036686081.

The square root of 18068663025625 is 4250725.

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

It can be written as a sum of positive squares in 7 ways, for example, as 17054364274249 + 1014298751376 = 4129693^2 + 1007124^2 .

It is not a de Polignac number, because 18068663025625 - 2³ = 18068663025617 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18068663025625.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 106183111 + ... + 106353139.

Almost surely, 2^{18068663025625} is an apocalyptic number.

18068663025625 is the 4250725-th square number.

18068663025625 is the 2125363-rd centered octagonal number.

It is an amenable number.

18068663025625 is a deficient number, since it is larger than the sum of its proper divisors (4510071084626).

18068663025625 is an frugal number, since it uses more digits than its factorization.

18068663025625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340078 (or 170034 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 58.

The spelling of 18068663025625 in words is "eighteen trillion, sixty-eight billion, six hundred sixty-three million, twenty-five thousand, six hundred twenty-five".