265508709163 has 2 divisors, whose sum is σ = 265508709164. Its totient is φ = 265508709162.

The previous prime is 265508709133. The next prime is 265508709197. The reversal of 265508709163 is 361907805562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 265508709163 - 2¹³ = 265508700971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 265508709163.

It is not a weakly prime, because it can be changed into another prime (265508709113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132754354581 + 132754354582.

It is an arithmetic number, because the mean of its divisors is an integer number (132754354582).

Almost surely, 2^265508709163 is an apocalyptic number.

265508709163 is a deficient number, since it is larger than the sum of its proper divisors (1).

265508709163 is an equidigital number, since it uses as much as digits as its factorization.

265508709163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 265508709163 in words is "two hundred sixty-five billion, five hundred eight million, seven hundred nine thousand, one hundred sixty-three".