25554561588 has 96 divisors (see below), whose sum is σ = 66686457600. Its totient is φ = 8462579328.

The previous prime is 25554561581. The next prime is 25554561611. The reversal of 25554561588 is 88516545552.

It is a happy number.

25554561588 is a `hidden beast` number, since 2 + 5 + 5 + 5 + 4 + 56 + 1 + 588 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25554561581) 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 31 ways as a sum of consecutive naturals, for example, 16000806 + ... + 16002402.

It is an arithmetic number, because the mean of its divisors is an integer number (694650600).

Almost surely, 2^25554561588 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 25554561588, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33343228800).

25554561588 is an abundant number, since it is smaller than the sum of its proper divisors (41131896012).

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

25554561588 is a wasteful number, since it uses less digits than its factorization.

25554561588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2486 (or 2478 counting only the distinct ones).

The product of its digits is 9600000, while the sum is 54.

The spelling of 25554561588 in words is "twenty-five billion, five hundred fifty-four million, five hundred sixty-one thousand, five hundred eighty-eight".