18264171025 has 27 divisors (see below), whose sum is σ = 22926627003. Its totient is φ = 14433486000.

The previous prime is 18264171007. The next prime is 18264171041. The reversal of 18264171025 is 52017146281.

The square root of 18264171025 is 135145.

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

It can be written as a sum of positive squares in only one way, i.e., 6575101569 + 11689069456 = 81087^2 + 108116^2 .

It is not a de Polignac number, because 18264171025 - 2⁹ = 18264170513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 102034386 + ... + 102034564.

Almost surely, 2^18264171025 is an apocalyptic number.

18264171025 is the 135145-th square number.

18264171025 is the 67573-rd centered octagonal number.

It is an amenable number.

18264171025 is a deficient number, since it is larger than the sum of its proper divisors (4662455978).

18264171025 is an frugal number, since it uses more digits than its factorization.

18264171025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The spelling of 18264171025 in words is "eighteen billion, two hundred sixty-four million, one hundred seventy-one thousand, twenty-five".