25330445505 has 24 divisors (see below), whose sum is σ = 44625882600. Its totient is φ = 13288101120.

The previous prime is 25330445501. The next prime is 25330445521. The reversal of 25330445505 is 50554403352.

It can be written as a sum of positive squares in 4 ways, for example, as 626150529 + 24704294976 = 25023^2 + 157176^2 .

It is not a de Polignac number, because 25330445505 - 2² = 25330445501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25330445505.

It is not an unprimeable number, because it can be changed into a prime (25330445501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4611180 + ... + 4616669.

It is an arithmetic number, because the mean of its divisors is an integer number (1859411775).

Almost surely, 2^25330445505 is an apocalyptic number.

It is an amenable number.

25330445505 is a deficient number, since it is larger than the sum of its proper divisors (19295437095).

25330445505 is a wasteful number, since it uses less digits than its factorization.

25330445505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9227921 (or 9227918 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 36.

Adding to 25330445505 its reverse (50554403352), we get a palindrome (75884848857).

The spelling of 25330445505 in words is "twenty-five billion, three hundred thirty million, four hundred forty-five thousand, five hundred five".