25521745760 has 192 divisors, whose sum is σ = 72220667904. Its totient is φ = 8333107200.

The previous prime is 25521745721. The next prime is 25521745787. The reversal of 25521745760 is 6754712552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6206105 + ... + 6210215.

It is an arithmetic number, because the mean of its divisors is an integer number (376149312).

Almost surely, 2^25521745760 is an apocalyptic number.

25521745760 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 25521745760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36110333952).

25521745760 is an abundant number, since it is smaller than the sum of its proper divisors (46698922144).

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

25521745760 is a wasteful number, since it uses less digits than its factorization.

25521745760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4397 (or 4389 counting only the distinct ones).

The product of its (nonzero) digits is 588000, while the sum is 44.

The spelling of 25521745760 in words is "twenty-five billion, five hundred twenty-one million, seven hundred forty-five thousand, seven hundred sixty".