25544644552 has 64 divisors (see below), whose sum is σ = 56788992000. Its totient is φ = 10541171520.

The previous prime is 25544644507. The next prime is 25544644561.

It is a happy number.

25544644552 is nontrivially palindromic in base 10.

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, 308493 + ... + 382435.

It is an arithmetic number, because the mean of its divisors is an integer number (887328000).

Almost surely, 2^25544644552 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 25544644552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28394496000).

25544644552 is an abundant number, since it is smaller than the sum of its proper divisors (31244347448).

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

25544644552 is a wasteful number, since it uses less digits than its factorization.

25544644552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74186 (or 74182 counting only the distinct ones).

The product of its digits is 3840000, while the sum is 46.

Adding to 25544644552 its product of digits (3840000), we get a palindrome (25548484552).

Subtracting from 25544644552 its product of digits (3840000), we obtain a palindrome (25540804552).

The spelling of 25544644552 in words is "twenty-five billion, five hundred forty-four million, six hundred forty-four thousand, five hundred fifty-two".