25855255853 has 4 divisors (see below), whose sum is σ = 29548863840. Its totient is φ = 22161647868.

The previous prime is 25855255849. The next prime is 25855255859. The reversal of 25855255853 is 35855255852.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25855255853 - 2² = 25855255849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25855255795 and 25855255804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25855255859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1846803983 + ... + 1846803996.

It is an arithmetic number, because the mean of its divisors is an integer number (7387215960).

Almost surely, 2^25855255853 is an apocalyptic number.

It is an amenable number.

25855255853 is a deficient number, since it is larger than the sum of its proper divisors (3693607987).

25855255853 is an equidigital number, since it uses as much as digits as its factorization.

25855255853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3693607986.

The product of its digits is 12000000, while the sum is 53.

Subtracting 25855255853 from its reverse (35855255852), we obtain a palindrome (9999999999).

The spelling of 25855255853 in words is "twenty-five billion, eight hundred fifty-five million, two hundred fifty-five thousand, eight hundred fifty-three".