25250808080 has 80 divisors (see below), whose sum is σ = 61001363520. Its totient is φ = 9708873216.

The previous prime is 25250808071. The next prime is 25250808133. The reversal of 25250808080 is 8080805252.

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

It is an unprimeable number.

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, 502667 + ... + 550613.

It is an arithmetic number, because the mean of its divisors is an integer number (762517044).

Almost surely, 2^25250808080 is an apocalyptic number.

25250808080 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 25250808080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30500681760).

25250808080 is an abundant number, since it is smaller than the sum of its proper divisors (35750555440).

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

25250808080 is a wasteful number, since it uses less digits than its factorization.

25250808080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48216 (or 48210 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 38.

The spelling of 25250808080 in words is "twenty-five billion, two hundred fifty million, eight hundred eight thousand, eighty".