25448681871 has 16 divisors (see below), whose sum is σ = 39686054400. Its totient is φ = 16072851384.

The previous prime is 25448681861. The next prime is 25448681897. The reversal of 25448681871 is 17818684452.

25448681871 is a `hidden beast` number, since 2 + 5 + 4 + 486 + 81 + 87 + 1 = 666.

It is not a de Polignac number, because 25448681871 - 2¹⁰ = 25448680847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25448681861) by changing a digit.

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, 24803271 + ... + 24804296.

It is an arithmetic number, because the mean of its divisors is an integer number (2480378400).

Almost surely, 2^25448681871 is an apocalyptic number.

25448681871 is a deficient number, since it is larger than the sum of its proper divisors (14237372529).

25448681871 is a wasteful number, since it uses less digits than its factorization.

25448681871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49607595 (or 49607589 counting only the distinct ones).

The product of its digits is 3440640, while the sum is 54.

The spelling of 25448681871 in words is "twenty-five billion, four hundred forty-eight million, six hundred eighty-one thousand, eight hundred seventy-one".