25451884872 has 96 divisors (see below), whose sum is σ = 72780708000. Its totient is φ = 8013012480.

The previous prime is 25451884859. The next prime is 25451884889. The reversal of 25451884872 is 27848815452.

25451884872 is a `hidden beast` number, since 2 + 5 + 451 + 88 + 48 + 72 = 666.

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 23 ways as a sum of consecutive naturals, for example, 424704 + ... + 480912.

It is an arithmetic number, because the mean of its divisors is an integer number (758132375).

Almost surely, 2^25451884872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25451884872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36390354000).

25451884872 is an abundant number, since it is smaller than the sum of its proper divisors (47328823128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25451884872 is a wasteful number, since it uses less digits than its factorization.

25451884872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56571 (or 56564 counting only the distinct ones).

The product of its digits is 5734400, while the sum is 54.

The spelling of 25451884872 in words is "twenty-five billion, four hundred fifty-one million, eight hundred eighty-four thousand, eight hundred seventy-two".