180270161 has 2 divisors, whose sum is σ = 180270162. Its totient is φ = 180270160.

The previous prime is 180270149. The next prime is 180270163. The reversal of 180270161 is 161072081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136445761 + 43824400 = 11681^2 + 6620^2 .

It is a cyclic number.

It is not a de Polignac number, because 180270161 - 2¹⁰ = 180269137 is a prime.

Together with 180270163, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 180270161.

It is not a weakly prime, because it can be changed into another prime (180270163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90135080 + 90135081.

It is an arithmetic number, because the mean of its divisors is an integer number (90135081).

Almost surely, 2^180270161 is an apocalyptic number.

It is an amenable number.

180270161 is a deficient number, since it is larger than the sum of its proper divisors (1).

180270161 is an equidigital number, since it uses as much as digits as its factorization.

180270161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 180270161 is about 13426.4723959795. The cubic root of 180270161 is about 564.9039552721.

The spelling of 180270161 in words is "one hundred eighty million, two hundred seventy thousand, one hundred sixty-one".