188907583225 has 9 divisors (see below), whose sum is σ = 234248097967. Its totient is φ = 151124328040.

The previous prime is 188907583159. The next prime is 188907583229. The reversal of 188907583225 is 522385709881.

The square root of 188907583225 is 434635.

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., 68006729961 + 120900853264 = 260781^2 + 347708^2 .

It is not a de Polignac number, because 188907583225 - 2²⁷ = 188773365497 is a prime.

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 188907583225.

It is not an unprimeable number, because it can be changed into a prime (188907583229) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2129712 + ... + 2216638.

Almost surely, 2^188907583225 is an apocalyptic number.

188907583225 is the 434635-th square number.

188907583225 is the 217318-th centered octagonal number.

It is an amenable number.

188907583225 is a deficient number, since it is larger than the sum of its proper divisors (45340514742).

188907583225 is an frugal number, since it uses more digits than its factorization.

188907583225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173864 (or 86932 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 58.

The spelling of 188907583225 in words is "one hundred eighty-eight billion, nine hundred seven million, five hundred eighty-three thousand, two hundred twenty-five".