25206448108265 has 4 divisors (see below), whose sum is σ = 30247737729924. Its totient is φ = 20165158486608.

The previous prime is 25206448108241. The next prime is 25206448108379. The reversal of 25206448108265 is 56280184460252.

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 4137953366416 + 21068494741849 = 2034196^2 + 4590043^2 .

It is a cyclic number.

It is not a de Polignac number, because 25206448108265 - 2⁴² = 20808401597161 is a prime.

It is a super-2 number, since 2×25206448108265² (a number of 28 digits) contains 22 as substring.

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, 2520644810822 + ... + 2520644810831.

It is an arithmetic number, because the mean of its divisors is an integer number (7561934432481).

Almost surely, 2^{25206448108265} is an apocalyptic number.

It is an amenable number.

25206448108265 is a deficient number, since it is larger than the sum of its proper divisors (5041289621659).

25206448108265 is an equidigital number, since it uses as much as digits as its factorization.

25206448108265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5041289621658.

The product of its (nonzero) digits is 7372800, while the sum is 53.

The spelling of 25206448108265 in words is "twenty-five trillion, two hundred six billion, four hundred forty-eight million, one hundred eight thousand, two hundred sixty-five".