265449255865 has 4 divisors (see below), whose sum is σ = 318539107044. Its totient is φ = 212359404688.

The previous prime is 265449255847. The next prime is 265449255937. The reversal of 265449255865 is 568552944562.

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 99255242304 + 166194013561 = 315048^2 + 407669^2 .

It is a cyclic number.

It is not a de Polignac number, because 265449255865 - 2²⁷ = 265315038137 is a prime.

It is a Duffinian number.

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, 26544925582 + ... + 26544925591.

It is an arithmetic number, because the mean of its divisors is an integer number (79634776761).

Almost surely, 2^265449255865 is an apocalyptic number.

It is an amenable number.

265449255865 is a deficient number, since it is larger than the sum of its proper divisors (53089851179).

265449255865 is an equidigital number, since it uses as much as digits as its factorization.

265449255865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53089851178.

The product of its digits is 103680000, while the sum is 61.

The spelling of 265449255865 in words is "two hundred sixty-five billion, four hundred forty-nine million, two hundred fifty-five thousand, eight hundred sixty-five".