25855255859 has 2 divisors, whose sum is σ = 25855255860. Its totient is φ = 25855255858.

The previous prime is 25855255849. The next prime is 25855255897. The reversal of 25855255859 is 95855255852.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25855255859 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25855255798 and 25855255807.

It is not a weakly prime, because it can be changed into another prime (25855255849) 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 as a sum of consecutive naturals, namely, 12927627929 + 12927627930.

It is an arithmetic number, because the mean of its divisors is an integer number (12927627930).

Almost surely, 2^25855255859 is an apocalyptic number.

25855255859 is a deficient number, since it is larger than the sum of its proper divisors (1).

25855255859 is an equidigital number, since it uses as much as digits as its factorization.

25855255859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36000000, while the sum is 59.

The spelling of 25855255859 in words is "twenty-five billion, eight hundred fifty-five million, two hundred fifty-five thousand, eight hundred fifty-nine".