263253498065 has 4 divisors (see below), whose sum is σ = 315904197684. Its totient is φ = 210602798448.

The previous prime is 263253498043. The next prime is 263253498071. The reversal of 263253498065 is 560894352362.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 194315219344 + 68938278721 = 440812^2 + 262561^2 .

It is a cyclic number.

It is not a de Polignac number, because 263253498065 - 2²⁰ = 263252449489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 263253497998 and 263253498016.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26325349802 + ... + 26325349811.

It is an arithmetic number, because the mean of its divisors is an integer number (78976049421).

Almost surely, 2^263253498065 is an apocalyptic number.

It is an amenable number.

263253498065 is a deficient number, since it is larger than the sum of its proper divisors (52650699619).

263253498065 is an equidigital number, since it uses as much as digits as its factorization.

263253498065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52650699618.

The product of its (nonzero) digits is 9331200, while the sum is 53.

The spelling of 263253498065 in words is "two hundred sixty-three billion, two hundred fifty-three million, four hundred ninety-eight thousand, sixty-five".