25550320441 has 4 divisors (see below), whose sum is σ = 25592976000. Its totient is φ = 25507664884.

The previous prime is 25550320423. The next prime is 25550320447. The reversal of 25550320441 is 14402305552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25550320441 - 2⁹ = 25550319929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25550320447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21326881 + ... + 21328078.

It is an arithmetic number, because the mean of its divisors is an integer number (6398244000).

Almost surely, 2^25550320441 is an apocalyptic number.

It is an amenable number.

25550320441 is a deficient number, since it is larger than the sum of its proper divisors (42655559).

25550320441 is an equidigital number, since it uses as much as digits as its factorization.

25550320441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42655558.

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 25550320441 its reverse (14402305552), we get a palindrome (39952625993).

The spelling of 25550320441 in words is "twenty-five billion, five hundred fifty million, three hundred twenty thousand, four hundred forty-one".