173709736225 has 9 divisors (see below), whose sum is σ = 215402657017. Its totient is φ = 138966121840.

The previous prime is 173709736219. The next prime is 173709736241. The reversal of 173709736225 is 522637907371.

The square root of 173709736225 is 416785.

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 833569 + 173708902656 = 913^2 + 416784^2 .

It is not a de Polignac number, because 173709736225 - 2⁷ = 173709736097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2042247 + ... + 2125603.

Almost surely, 2^173709736225 is an apocalyptic number.

173709736225 is the 416785-th square number.

173709736225 is the 208393-rd centered octagonal number.

It is an amenable number.

173709736225 is a deficient number, since it is larger than the sum of its proper divisors (41692920792).

173709736225 is an frugal number, since it uses more digits than its factorization.

173709736225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166724 (or 83362 counting only the distinct ones).

The product of its (nonzero) digits is 3333960, while the sum is 52.

The spelling of 173709736225 in words is "one hundred seventy-three billion, seven hundred nine million, seven hundred thirty-six thousand, two hundred twenty-five".