25504450332240 has 640 divisors, whose sum is σ = 93383423078400. Its totient is φ = 5693065297920.

The previous prime is 25504450332239. The next prime is 25504450332253. The reversal of 25504450332240 is 4223305440552.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 593395071 + ... + 593438049.

It is an arithmetic number, because the mean of its divisors is an integer number (145911598560).

Almost surely, 2^{25504450332240} is an apocalyptic number.

25504450332240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25504450332240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46691711539200).

25504450332240 is an abundant number, since it is smaller than the sum of its proper divisors (67878972746160).

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

25504450332240 is a wasteful number, since it uses less digits than its factorization.

25504450332240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43395 (or 43389 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 39.

Adding to 25504450332240 its reverse (4223305440552), we get a palindrome (29727755772792).

The spelling of 25504450332240 in words is "twenty-five trillion, five hundred four billion, four hundred fifty million, three hundred thirty-two thousand, two hundred forty".