25844441321 has 2 divisors, whose sum is σ = 25844441322. Its totient is φ = 25844441320.

The previous prime is 25844441261. The next prime is 25844441323. The reversal of 25844441321 is 12314444852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17732917225 + 8111524096 = 133165^2 + 90064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25844441321 is a prime.

It is a super-2 number, since 2×25844441321² (a number of 22 digits) contains 22 as substring.

Together with 25844441323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25844441323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12922220660 + 12922220661.

It is an arithmetic number, because the mean of its divisors is an integer number (12922220661).

Almost surely, 2^25844441321 is an apocalyptic number.

It is an amenable number.

25844441321 is a deficient number, since it is larger than the sum of its proper divisors (1).

25844441321 is an equidigital number, since it uses as much as digits as its factorization.

25844441321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122880, while the sum is 38.

The spelling of 25844441321 in words is "twenty-five billion, eight hundred forty-four million, four hundred forty-one thousand, three hundred twenty-one".