194595943555225 has 27 divisors (see below), whose sum is σ = 242405255818719. Its totient is φ = 154966265413200.

The previous prime is 194595943555171. The next prime is 194595943555231. The reversal of 194595943555225 is 522555349595491.

The square root of 194595943555225 is 13949765.

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

194595943555225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 70054539679881 + 124541403875344 = 8369859^2 + 11159812^2 .

It is not a de Polignac number, because 194595943555225 - 2¹⁵ = 194595943522457 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, 15553981720 + ... + 15553994230.

Almost surely, 2^{194595943555225} is an apocalyptic number.

194595943555225 is the 13949765-th square number.

194595943555225 is the 6974883-rd centered octagonal number.

It is an amenable number.

194595943555225 is a deficient number, since it is larger than the sum of its proper divisors (47809312263494).

194595943555225 is an frugal number, since it uses more digits than its factorization.

194595943555225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25478 (or 12739 counting only the distinct ones).

The product of its digits is 2187000000, while the sum is 73.

The spelling of 194595943555225 in words is "one hundred ninety-four trillion, five hundred ninety-five billion, nine hundred forty-three million, five hundred fifty-five thousand, two hundred twenty-five".