265255061209 has 2 divisors, whose sum is σ = 265255061210. Its totient is φ = 265255061208.

The previous prime is 265255061173. The next prime is 265255061251. The reversal of 265255061209 is 902160552562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207785547225 + 57469513984 = 455835^2 + 239728^2 .

It is a cyclic number.

It is not a de Polignac number, because 265255061209 - 2¹³ = 265255053017 is a prime.

It is not a weakly prime, because it can be changed into another prime (265255061009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132627530604 + 132627530605.

It is an arithmetic number, because the mean of its divisors is an integer number (132627530605).

Almost surely, 2^265255061209 is an apocalyptic number.

It is an amenable number.

265255061209 is a deficient number, since it is larger than the sum of its proper divisors (1).

265255061209 is an equidigital number, since it uses as much as digits as its factorization.

265255061209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 265255061209 in words is "two hundred sixty-five billion, two hundred fifty-five million, sixty-one thousand, two hundred nine".