27505000189 has 2 divisors, whose sum is σ = 27505000190. Its totient is φ = 27505000188.

The previous prime is 27505000157. The next prime is 27505000217. The reversal of 27505000189 is 98100050572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20315656089 + 7189344100 = 142533^2 + 84790^2 .

It is a cyclic number.

It is not a de Polignac number, because 27505000189 - 2⁵ = 27505000157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27505000109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13752500094 + 13752500095.

It is an arithmetic number, because the mean of its divisors is an integer number (13752500095).

Almost surely, 2^27505000189 is an apocalyptic number.

It is an amenable number.

27505000189 is a deficient number, since it is larger than the sum of its proper divisors (1).

27505000189 is an equidigital number, since it uses as much as digits as its factorization.

27505000189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 37.

The spelling of 27505000189 in words is "twenty-seven billion, five hundred five million, one hundred eighty-nine", and thus it is an aban number.