25275835872 has 144 divisors (see below), whose sum is σ = 82774403712. Its totient is φ = 7166465280.

The previous prime is 25275835859. The next prime is 25275835889. The reversal of 25275835872 is 27853857252.

25275835872 is a `hidden beast` number, since 2 + 5 + 2 + 7 + 58 + 3 + 587 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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 23 ways as a sum of consecutive naturals, for example, 216243 + ... + 311949.

It is an arithmetic number, because the mean of its divisors is an integer number (574822248).

Almost surely, 2^25275835872 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 25275835872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41387201856).

25275835872 is an abundant number, since it is smaller than the sum of its proper divisors (57498567840).

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

25275835872 is a wasteful number, since it uses less digits than its factorization.

25275835872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95861 (or 95850 counting only the distinct ones).

The product of its digits is 9408000, while the sum is 54.

The spelling of 25275835872 in words is "twenty-five billion, two hundred seventy-five million, eight hundred thirty-five thousand, eight hundred seventy-two".