25817052448 has 192 divisors, whose sum is σ = 60320889216. Its totient is φ = 10745856000.

The previous prime is 25817052421. The next prime is 25817052461. The reversal of 25817052448 is 84425071852.

It is a junction number, because it is equal to n+sod(n) for n = 25817052398 and 25817052407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39057238 + ... + 39057898.

It is an arithmetic number, because the mean of its divisors is an integer number (314171298).

Almost surely, 2^25817052448 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 25817052448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30160444608).

25817052448 is an abundant number, since it is smaller than the sum of its proper divisors (34503836768).

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

25817052448 is a wasteful number, since it uses less digits than its factorization.

25817052448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867 (or 859 counting only the distinct ones).

The product of its (nonzero) digits is 716800, while the sum is 46.

The spelling of 25817052448 in words is "twenty-five billion, eight hundred seventeen million, fifty-two thousand, four hundred forty-eight".