27722732189 has 2 divisors, whose sum is σ = 27722732190. Its totient is φ = 27722732188.

The previous prime is 27722732179. The next prime is 27722732243. The reversal of 27722732189 is 98123722772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27669660964 + 53071225 = 166342^2 + 7285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27722732189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27722732119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13861366094 + 13861366095.

It is an arithmetic number, because the mean of its divisors is an integer number (13861366095).

Almost surely, 2^27722732189 is an apocalyptic number.

It is an amenable number.

27722732189 is a deficient number, since it is larger than the sum of its proper divisors (1).

27722732189 is an equidigital number, since it uses as much as digits as its factorization.

27722732189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1185408, while the sum is 50.

The spelling of 27722732189 in words is "twenty-seven billion, seven hundred twenty-two million, seven hundred thirty-two thousand, one hundred eighty-nine".