25521408000 has 1152 divisors, whose sum is σ = 107628393600. Its totient is φ = 5750784000.

The previous prime is 25521407993. The next prime is 25521408001. The reversal of 25521408000 is 80412552.

It is a happy number.

25521408000 is a `hidden beast` number, since 25 + 521 + 40 + 80 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25521408001) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 481535974 + ... + 481536026.

It is an arithmetic number, because the mean of its divisors is an integer number (93427425).

Almost surely, 2^25521408000 is an apocalyptic number.

25521408000 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 25521408000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53814196800).

25521408000 is an abundant number, since it is smaller than the sum of its proper divisors (82106985600).

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

25521408000 is a wasteful number, since it uses less digits than its factorization.

25521408000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The spelling of 25521408000 in words is "twenty-five billion, five hundred twenty-one million, four hundred eight thousand".