25500396416 has 64 divisors (see below), whose sum is σ = 55453075200. Its totient is φ = 11584151040.

The previous prime is 25500396409. The next prime is 25500396437. The reversal of 25500396416 is 61469300552.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2900315 + ... + 2909093.

It is an arithmetic number, because the mean of its divisors is an integer number (866454300).

Almost surely, 2^25500396416 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 25500396416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27726537600).

25500396416 is an abundant number, since it is smaller than the sum of its proper divisors (29952678784).

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

25500396416 is a wasteful number, since it uses less digits than its factorization.

25500396416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10867 (or 10855 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 41.

Adding to 25500396416 its reverse (61469300552), we get a palindrome (86969696968).

The spelling of 25500396416 in words is "twenty-five billion, five hundred million, three hundred ninety-six thousand, four hundred sixteen".