25985487559 has 4 divisors (see below), whose sum is σ = 26341453216. Its totient is φ = 25629521904.

The previous prime is 25985487557. The next prime is 25985487601. The reversal of 25985487559 is 95578458952.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25985487559 - 2¹ = 25985487557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25985487494 and 25985487503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25985487557) 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, 177982719 + ... + 177982864.

It is an arithmetic number, because the mean of its divisors is an integer number (6585363304).

Almost surely, 2^25985487559 is an apocalyptic number.

25985487559 is a deficient number, since it is larger than the sum of its proper divisors (355965657).

25985487559 is an equidigital number, since it uses as much as digits as its factorization.

25985487559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355965656.

The product of its digits is 181440000, while the sum is 67.

The spelling of 25985487559 in words is "twenty-five billion, nine hundred eighty-five million, four hundred eighty-seven thousand, five hundred fifty-nine".