25500255505 has 4 divisors (see below), whose sum is σ = 30600306612. Its totient is φ = 20400204400.

The previous prime is 25500255479. The next prime is 25500255511. The reversal of 25500255505 is 50555200552.

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 14397840081 + 11102415424 = 119991^2 + 105368^2 .

It is not a de Polignac number, because 25500255505 - 2²¹ = 25498158353 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, 2550025546 + ... + 2550025555.

It is an arithmetic number, because the mean of its divisors is an integer number (7650076653).

Almost surely, 2^25500255505 is an apocalyptic number.

It is an amenable number.

25500255505 is a deficient number, since it is larger than the sum of its proper divisors (5100051107).

25500255505 is an equidigital number, since it uses as much as digits as its factorization.

25500255505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5100051106.

The product of its (nonzero) digits is 62500, while the sum is 34.

The spelling of 25500255505 in words is "twenty-five billion, five hundred million, two hundred fifty-five thousand, five hundred five".