25425722480 has 80 divisors (see below), whose sum is σ = 62259541920. Its totient is φ = 9629835264.

The previous prime is 25425722473. The next prime is 25425722521. The reversal of 25425722480 is 8422752452.

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

It is a congruent number.

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, 3998984 + ... + 4005336.

It is an arithmetic number, because the mean of its divisors is an integer number (778244274).

Almost surely, 2^25425722480 is an apocalyptic number.

25425722480 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 25425722480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31129770960).

25425722480 is an abundant number, since it is smaller than the sum of its proper divisors (36833819440).

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

25425722480 is a wasteful number, since it uses less digits than its factorization.

25425722480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9018 (or 9012 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 41.

The spelling of 25425722480 in words is "twenty-five billion, four hundred twenty-five million, seven hundred twenty-two thousand, four hundred eighty".