265334640563 has 2 divisors, whose sum is σ = 265334640564. Its totient is φ = 265334640562.

The previous prime is 265334640517. The next prime is 265334640587. The reversal of 265334640563 is 365046433562.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 265334640563 - 2¹⁴ = 265334624179 is a prime.

It is not a weakly prime, because it can be changed into another prime (265334640503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132667320281 + 132667320282.

It is an arithmetic number, because the mean of its divisors is an integer number (132667320282).

Almost surely, 2^265334640563 is an apocalyptic number.

265334640563 is a deficient number, since it is larger than the sum of its proper divisors (1).

265334640563 is an equidigital number, since it uses as much as digits as its factorization.

265334640563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4665600, while the sum is 47.

The spelling of 265334640563 in words is "two hundred sixty-five billion, three hundred thirty-four million, six hundred forty thousand, five hundred sixty-three".