25871318125 has 10 divisors (see below), whose sum is σ = 32328799910. Its totient is φ = 20697054000.

The previous prime is 25871318107. The next prime is 25871318167. The reversal of 25871318125 is 52181317852.

It can be written as a sum of positive squares in 5 ways, for example, as 12522057604 + 13349260521 = 111902^2 + 115539^2 .

It is not a de Polignac number, because 25871318125 - 2⁹ = 25871317613 is a prime.

It is a congruent number.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 20696430 + ... + 20697679.

It is an arithmetic number, because the mean of its divisors is an integer number (3232879991).

Almost surely, 2^25871318125 is an apocalyptic number.

25871318125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25871318125 is a deficient number, since it is larger than the sum of its proper divisors (6457481785).

25871318125 is an frugal number, since it uses more digits than its factorization.

25871318125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41394129 (or 41394114 counting only the distinct ones).

The product of its digits is 134400, while the sum is 43.

The spelling of 25871318125 in words is "twenty-five billion, eight hundred seventy-one million, three hundred eighteen thousand, one hundred twenty-five".