25986843865 has 16 divisors (see below), whose sum is σ = 31566532608. Its totient is φ = 20535615936.

The previous prime is 25986843853. The next prime is 25986843893. The reversal of 25986843865 is 56834868952.

It is not a de Polignac number, because 25986843865 - 2⁹ = 25986843353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25986843797 and 25986843806.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140904 + ... + 268006.

It is an arithmetic number, because the mean of its divisors is an integer number (1972908288).

Almost surely, 2^25986843865 is an apocalyptic number.

It is an amenable number.

25986843865 is a deficient number, since it is larger than the sum of its proper divisors (5579688743).

25986843865 is a wasteful number, since it uses less digits than its factorization.

25986843865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127608.

The product of its digits is 99532800, while the sum is 64.

The spelling of 25986843865 in words is "twenty-five billion, nine hundred eighty-six million, eight hundred forty-three thousand, eight hundred sixty-five".