265243326535457 has 2 divisors, whose sum is σ = 265243326535458. Its totient is φ = 265243326535456.

The previous prime is 265243326535399. The next prime is 265243326535507. The reversal of 265243326535457 is 754535623342562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143260049018641 + 121983277516816 = 11969129^2 + 11044604^2 .

It is a cyclic number.

It is not a de Polignac number, because 265243326535457 - 2¹⁶ = 265243326469921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 265243326535457.

It is not a weakly prime, because it can be changed into another prime (265243326535757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132621663267728 + 132621663267729.

It is an arithmetic number, because the mean of its divisors is an integer number (132621663267729).

Almost surely, 2^{265243326535457} is an apocalyptic number.

It is an amenable number.

265243326535457 is a deficient number, since it is larger than the sum of its proper divisors (1).

265243326535457 is an equidigital number, since it uses as much as digits as its factorization.

265243326535457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320000, while the sum is 62.

The spelling of 265243326535457 in words is "two hundred sixty-five trillion, two hundred forty-three billion, three hundred twenty-six million, five hundred thirty-five thousand, four hundred fifty-seven".