25481532880 has 20 divisors (see below), whose sum is σ = 59244564132. Its totient is φ = 10192613120.

The previous prime is 25481532829. The next prime is 25481532889. The reversal of 25481532880 is 8823518452.

It can be written as a sum of positive squares in 2 ways, for example, as 4052086336 + 21429446544 = 63656^2 + 146388^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 25481532880.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25481532889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159259501 + ... + 159259660.

Almost surely, 2^25481532880 is an apocalyptic number.

25481532880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25481532880 is an abundant number, since it is smaller than the sum of its proper divisors (33763031252).

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

25481532880 is a wasteful number, since it uses less digits than its factorization.

25481532880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318519174 (or 318519168 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 46.

The spelling of 25481532880 in words is "twenty-five billion, four hundred eighty-one million, five hundred thirty-two thousand, eight hundred eighty".