25305520000 has 320 divisors, whose sum is σ = 69688317600. Its totient is φ = 9101312000.

The previous prime is 25305519991. The next prime is 25305520013. The reversal of 25305520000 is 2550352.

It is a tau number, because it is divible by the number of its divisors (320).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 31279596 + ... + 31280404.

Almost surely, 2^25305520000 is an apocalyptic number.

25305520000 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 25305520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34844158800).

25305520000 is an abundant number, since it is smaller than the sum of its proper divisors (44382797600).

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

25305520000 is an equidigital number, since it uses as much as digits as its factorization.

25305520000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883 (or 856 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 22.

The spelling of 25305520000 in words is "twenty-five billion, three hundred five million, five hundred twenty thousand".