265134463321361 has 2 divisors, whose sum is σ = 265134463321362. Its totient is φ = 265134463321360.

The previous prime is 265134463321237. The next prime is 265134463321363. The reversal of 265134463321361 is 163123364431562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139376181681361 + 125758281640000 = 11805769^2 + 11214200^2 .

It is a cyclic number.

It is not a de Polignac number, because 265134463321361 - 2¹⁸ = 265134463059217 is a prime.

It is a super-2 number, since 2×265134463321361² (a number of 30 digits) contains 22 as substring.

Together with 265134463321363, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (265134463321363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132567231660680 + 132567231660681.

It is an arithmetic number, because the mean of its divisors is an integer number (132567231660681).

Almost surely, 2^{265134463321361} is an apocalyptic number.

It is an amenable number.

265134463321361 is a deficient number, since it is larger than the sum of its proper divisors (1).

265134463321361 is an equidigital number, since it uses as much as digits as its factorization.

265134463321361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5598720, while the sum is 50.

The spelling of 265134463321361 in words is "two hundred sixty-five trillion, one hundred thirty-four billion, four hundred sixty-three million, three hundred twenty-one thousand, three hundred sixty-one".