25501504000 has 160 divisors (see below), whose sum is σ = 72675098496. Its totient is φ = 8743219200.

The previous prime is 25501503997. The next prime is 25501504001. The reversal of 25501504000 is 40510552.

It is a tau number, because it is divible by the number of its divisors (160).

It is not an unprimeable number, because it can be changed into a prime (25501504001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 419539 + ... + 476461.

Almost surely, 2^25501504000 is an apocalyptic number.

25501504000 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 25501504000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36337549248).

25501504000 is an abundant number, since it is smaller than the sum of its proper divisors (47173594496).

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

25501504000 is an frugal number, since it uses more digits than its factorization.

25501504000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56963 (or 56937 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The spelling of 25501504000 in words is "twenty-five billion, five hundred one million, five hundred four thousand".