25812478000 has 80 divisors (see below), whose sum is σ = 62676881280. Its totient is φ = 10281600000.

The previous prime is 25812477991. The next prime is 25812478001. The reversal of 25812478000 is 87421852.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (25812478001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 451000 + ... + 505000.

It is an arithmetic number, because the mean of its divisors is an integer number (783461016).

Almost surely, 2^25812478000 is an apocalyptic number.

25812478000 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 25812478000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31338440640).

25812478000 is an abundant number, since it is smaller than the sum of its proper divisors (36864403280).

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

25812478000 is a wasteful number, since it uses less digits than its factorization.

25812478000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54263 (or 54247 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 37.

Adding to 25812478000 its reverse (87421852), we get a palindrome (25899899852).

The spelling of 25812478000 in words is "twenty-five billion, eight hundred twelve million, four hundred seventy-eight thousand".