178285651093225 has 27 divisors (see below), whose sum is σ = 239389212377199. Its totient is φ = 131656455278400.

The previous prime is 178285651093223. The next prime is 178285651093237. The reversal of 178285651093225 is 522390156582871.

It is a happy number.

The square root of 178285651093225 is 13352365.

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

It can be written as a sum of positive squares in 13 ways, for example, as 111872865538009 + 66412785555216 = 10576997^2 + 8149404^2 .

It is not a de Polignac number, because 178285651093225 - 2¹ = 178285651093223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (178285651093223) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 867801015 + ... + 868006435.

Almost surely, 2^{178285651093225} is an apocalyptic number.

178285651093225 is the 13352365-th square number.

178285651093225 is the 6676183-rd centered octagonal number.

It is an amenable number.

178285651093225 is a deficient number, since it is larger than the sum of its proper divisors (61103561283974).

178285651093225 is an frugal number, since it uses more digits than its factorization.

178285651093225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410878 (or 205439 counting only the distinct ones).

The product of its (nonzero) digits is 72576000, while the sum is 64.

The spelling of 178285651093225 in words is "one hundred seventy-eight trillion, two hundred eighty-five billion, six hundred fifty-one million, ninety-three thousand, two hundred twenty-five".