27750602161 has 2 divisors, whose sum is σ = 27750602162. Its totient is φ = 27750602160.

The previous prime is 27750602149. The next prime is 27750602189. The reversal of 27750602161 is 16120605772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22516803136 + 5233799025 = 150056^2 + 72345^2 .

It is a cyclic number.

It is not a de Polignac number, because 27750602161 - 2⁹ = 27750601649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27750602161.

It is not a weakly prime, because it can be changed into another prime (27750602141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13875301080 + 13875301081.

It is an arithmetic number, because the mean of its divisors is an integer number (13875301081).

Almost surely, 2^27750602161 is an apocalyptic number.

It is an amenable number.

27750602161 is a deficient number, since it is larger than the sum of its proper divisors (1).

27750602161 is an equidigital number, since it uses as much as digits as its factorization.

27750602161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 37.

The spelling of 27750602161 in words is "twenty-seven billion, seven hundred fifty million, six hundred two thousand, one hundred sixty-one".