17117797225 has 27 divisors (see below), whose sum is σ = 21494668741. Its totient is φ = 13523105600.

The previous prime is 17117797187. The next prime is 17117797273. The reversal of 17117797225 is 52279771171.

It is a happy number.

The square root of 17117797225 is 130835.

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 49942489 + 17067854736 = 7067^2 + 130644^2 .

It is not a de Polignac number, because 17117797225 - 2¹⁹ = 17117272937 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, 89621880 + ... + 89622070.

Almost surely, 2^17117797225 is an apocalyptic number.

17117797225 is the 130835-th square number.

17117797225 is the 65418-th centered octagonal number.

It is an amenable number.

17117797225 is a deficient number, since it is larger than the sum of its proper divisors (4376871516).

17117797225 is an frugal number, since it uses more digits than its factorization.

17117797225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666 (or 333 counting only the distinct ones).

The product of its digits is 432180, while the sum is 49.

Multiplying 17117797225 by its sum of digits (49), we get a square (838772064025 = 915845²).

The spelling of 17117797225 in words is "seventeen billion, one hundred seventeen million, seven hundred ninety-seven thousand, two hundred twenty-five".