25522615552 has 144 divisors (see below), whose sum is σ = 59920922880. Its totient is φ = 10623614976.

The previous prime is 25522615543. The next prime is 25522615553. The reversal of 25522615552 is 25551622552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25522615553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9781224 + ... + 9783832.

It is an arithmetic number, because the mean of its divisors is an integer number (416117520).

Almost surely, 2^25522615552 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 25522615552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29960461440).

25522615552 is an abundant number, since it is smaller than the sum of its proper divisors (34398307328).

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

25522615552 is a wasteful number, since it uses less digits than its factorization.

25522615552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2788 (or 2774 counting only the distinct ones).

The product of its digits is 300000, while the sum is 40.

The spelling of 25522615552 in words is "twenty-five billion, five hundred twenty-two million, six hundred fifteen thousand, five hundred fifty-two".