265406232653543 has 2 divisors, whose sum is σ = 265406232653544. Its totient is φ = 265406232653542.

The previous prime is 265406232653521. The next prime is 265406232653563. The reversal of 265406232653543 is 345356232604562.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265406232653543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265406232653563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132703116326771 + 132703116326772.

It is an arithmetic number, because the mean of its divisors is an integer number (132703116326772).

Almost surely, 2^{265406232653543} is an apocalyptic number.

265406232653543 is a deficient number, since it is larger than the sum of its proper divisors (1).

265406232653543 is an equidigital number, since it uses as much as digits as its factorization.

265406232653543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312000, while the sum is 56.

The spelling of 265406232653543 in words is "two hundred sixty-five trillion, four hundred six billion, two hundred thirty-two million, six hundred fifty-three thousand, five hundred forty-three".