272564161 has 2 divisors, whose sum is σ = 272564162. Its totient is φ = 272564160.

The previous prime is 272564137. The next prime is 272564209. The reversal of 272564161 is 161465272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142945936 + 129618225 = 11956^2 + 11385^2 .

It is a cyclic number.

It is not a de Polignac number, because 272564161 - 2²⁷ = 138346433 is a prime.

It is not a weakly prime, because it can be changed into another prime (272561161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136282080 + 136282081.

It is an arithmetic number, because the mean of its divisors is an integer number (136282081).

Almost surely, 2^272564161 is an apocalyptic number.

It is an amenable number.

272564161 is a deficient number, since it is larger than the sum of its proper divisors (1).

272564161 is an equidigital number, since it uses as much as digits as its factorization.

272564161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 272564161 is about 16509.5172854932. The cubic root of 272564161 is about 648.3700074343.

The spelling of 272564161 in words is "two hundred seventy-two million, five hundred sixty-four thousand, one hundred sixty-one".