272605561 has 2 divisors, whose sum is σ = 272605562. Its totient is φ = 272605560.

The previous prime is 272605519. The next prime is 272605577. The reversal of 272605561 is 165506272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152374336 + 120231225 = 12344^2 + 10965^2 .

It is a cyclic number.

It is not a de Polignac number, because 272605561 - 2⁹ = 272605049 is a prime.

It is not a weakly prime, because it can be changed into another prime (272605061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136302780 + 136302781.

It is an arithmetic number, because the mean of its divisors is an integer number (136302781).

Almost surely, 2^272605561 is an apocalyptic number.

It is an amenable number.

272605561 is a deficient number, since it is larger than the sum of its proper divisors (1).

272605561 is an equidigital number, since it uses as much as digits as its factorization.

272605561 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 34.

The square root of 272605561 is about 16510.7710601292. The cubic root of 272605561 is about 648.4028329279.

The spelling of 272605561 in words is "two hundred seventy-two million, six hundred five thousand, five hundred sixty-one".