25520745600 has 384 divisors, whose sum is σ = 106744060800. Its totient is φ = 5833175040.

The previous prime is 25520745581. The next prime is 25520745643. The reversal of 25520745600 is 654702552.

25520745600 is a `hidden beast` number, since 2 + 5 + 5 + 2 + 0 + 7 + 45 + 600 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 583702 + ... + 625898.

It is an arithmetic number, because the mean of its divisors is an integer number (277979325).

Almost surely, 2^25520745600 is an apocalyptic number.

25520745600 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 25520745600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53372030400).

25520745600 is an abundant number, since it is smaller than the sum of its proper divisors (81223315200).

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

25520745600 is a wasteful number, since it uses less digits than its factorization.

25520745600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42237 (or 42214 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

The spelling of 25520745600 in words is "twenty-five billion, five hundred twenty million, seven hundred forty-five thousand, six hundred".