25803447208 has 64 divisors (see below), whose sum is σ = 60430809600. Its totient is φ = 10034781120.

The previous prime is 25803447151. The next prime is 25803447221. The reversal of 25803447208 is 80274430852.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 298663 + ... + 375241.

It is an arithmetic number, because the mean of its divisors is an integer number (944231400).

Almost surely, 2^25803447208 is an apocalyptic number.

25803447208 is a gapful number since it is divisible by the number (28) 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 25803447208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30215404800).

25803447208 is an abundant number, since it is smaller than the sum of its proper divisors (34627362392).

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

25803447208 is a wasteful number, since it uses less digits than its factorization.

25803447208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77150 (or 77146 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 43.

The spelling of 25803447208 in words is "twenty-five billion, eight hundred three million, four hundred forty-seven thousand, two hundred eight".