265235343110561 has 2 divisors, whose sum is σ = 265235343110562. Its totient is φ = 265235343110560.

The previous prime is 265235343110557. The next prime is 265235343110581. The reversal of 265235343110561 is 165011343532562.

265235343110561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203893239416161 + 61342103694400 = 14279119^2 + 7832120^2 .

It is a cyclic number.

It is not a de Polignac number, because 265235343110561 - 2² = 265235343110557 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (265235343110581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132617671555280 + 132617671555281.

It is an arithmetic number, because the mean of its divisors is an integer number (132617671555281).

Almost surely, 2^{265235343110561} is an apocalyptic number.

It is an amenable number.

265235343110561 is a deficient number, since it is larger than the sum of its proper divisors (1).

265235343110561 is an equidigital number, since it uses as much as digits as its factorization.

265235343110561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944000, while the sum is 47.

The spelling of 265235343110561 in words is "two hundred sixty-five trillion, two hundred thirty-five billion, three hundred forty-three million, one hundred ten thousand, five hundred sixty-one".