205885625189 has 2 divisors, whose sum is σ = 205885625190. Its totient is φ = 205885625188.

The previous prime is 205885625173. The next prime is 205885625219. The reversal of 205885625189 is 981526588502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201818374564 + 4067250625 = 449242^2 + 63775^2 .

It is a cyclic number.

It is not a de Polignac number, because 205885625189 - 2⁴ = 205885625173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205885625119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102942812594 + 102942812595.

It is an arithmetic number, because the mean of its divisors is an integer number (102942812595).

Almost surely, 2^205885625189 is an apocalyptic number.

It is an amenable number.

205885625189 is a deficient number, since it is larger than the sum of its proper divisors (1).

205885625189 is an equidigital number, since it uses as much as digits as its factorization.

205885625189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824000, while the sum is 59.

The spelling of 205885625189 in words is "two hundred five billion, eight hundred eighty-five million, six hundred twenty-five thousand, one hundred eighty-nine".