25921414272 has 128 divisors (see below), whose sum is σ = 75089952000. Its totient is φ = 7874740224.

The previous prime is 25921414217. The next prime is 25921414279. The reversal of 25921414272 is 27241412952.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 25921414272.

It is not an unprimeable number, because it can be changed into a prime (25921414279) 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, 361504 + ... + 427232.

It is an arithmetic number, because the mean of its divisors is an integer number (586640250).

Almost surely, 2^25921414272 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 25921414272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37544976000).

25921414272 is an abundant number, since it is smaller than the sum of its proper divisors (49168537728).

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

25921414272 is a wasteful number, since it uses less digits than its factorization.

25921414272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65838 (or 65826 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The spelling of 25921414272 in words is "twenty-five billion, nine hundred twenty-one million, four hundred fourteen thousand, two hundred seventy-two".