25887173289 has 16 divisors (see below), whose sum is σ = 34613526528. Its totient is φ = 17209538192.

The previous prime is 25887173281. The next prime is 25887173303. The reversal of 25887173289 is 98237178852.

It is a cyclic number.

It is not a de Polignac number, because 25887173289 - 2³ = 25887173281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25887173281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1597144 + ... + 1613270.

It is an arithmetic number, because the mean of its divisors is an integer number (2163345408).

Almost surely, 2^25887173289 is an apocalyptic number.

It is an amenable number.

25887173289 is a deficient number, since it is larger than the sum of its proper divisors (8726353239).

25887173289 is a wasteful number, since it uses less digits than its factorization.

25887173289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17604.

The product of its digits is 13547520, while the sum is 60.

The spelling of 25887173289 in words is "twenty-five billion, eight hundred eighty-seven million, one hundred seventy-three thousand, two hundred eighty-nine".