25455523533440 has 512 divisors, whose sum is σ = 82303574653440. Its totient is φ = 7270382960640.

The previous prime is 25455523533439. The next prime is 25455523533467. The reversal of 25455523533440 is 4433532555452.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 87622664 + ... + 87912696.

It is an arithmetic number, because the mean of its divisors is an integer number (160749169245).

Almost surely, 2^{25455523533440} is an apocalyptic number.

25455523533440 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 25455523533440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41151787326720).

25455523533440 is an abundant number, since it is smaller than the sum of its proper divisors (56848051120000).

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

25455523533440 is a wasteful number, since it uses less digits than its factorization.

25455523533440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290220 (or 290208 counting only the distinct ones).

The product of its (nonzero) digits is 21600000, while the sum is 50.

The spelling of 25455523533440 in words is "twenty-five trillion, four hundred fifty-five billion, five hundred twenty-three million, five hundred thirty-three thousand, four hundred forty".