25505528832 has 352 divisors, whose sum is σ = 87445219840. Its totient is φ = 7282814976.

The previous prime is 25505528813. The next prime is 25505528833. The reversal of 25505528832 is 23882550552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25505528833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15675603 + ... + 15677229.

It is an arithmetic number, because the mean of its divisors is an integer number (248423920).

Almost surely, 2^25505528832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25505528832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43722609920).

25505528832 is an abundant number, since it is smaller than the sum of its proper divisors (61939691008).

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

25505528832 is an frugal number, since it uses more digits than its factorization.

25505528832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675 (or 1639 counting only the distinct ones).

The product of its (nonzero) digits is 960000, while the sum is 45.

The spelling of 25505528832 in words is "twenty-five billion, five hundred five million, five hundred twenty-eight thousand, eight hundred thirty-two".