265444137313 has 2 divisors, whose sum is σ = 265444137314. Its totient is φ = 265444137312.

The previous prime is 265444137251. The next prime is 265444137331. The reversal of 265444137313 is 313731444562.

Together with next prime (265444137331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 246197569489 + 19246567824 = 496183^2 + 138732^2 .

It is a cyclic number.

It is not a de Polignac number, because 265444137313 - 2¹³ = 265444129121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 265444137313.

It is not a weakly prime, because it can be changed into another prime (265444137353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132722068656 + 132722068657.

It is an arithmetic number, because the mean of its divisors is an integer number (132722068657).

Almost surely, 2^265444137313 is an apocalyptic number.

It is an amenable number.

265444137313 is a deficient number, since it is larger than the sum of its proper divisors (1).

265444137313 is an equidigital number, since it uses as much as digits as its factorization.

265444137313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 43.

The spelling of 265444137313 in words is "two hundred sixty-five billion, four hundred forty-four million, one hundred thirty-seven thousand, three hundred thirteen".