25383617641 has 2 divisors, whose sum is σ = 25383617642. Its totient is φ = 25383617640.

The previous prime is 25383617639. The next prime is 25383617681. The reversal of 25383617641 is 14671638352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23447265625 + 1936352016 = 153125^2 + 44004^2 .

It is a cyclic number.

It is not a de Polignac number, because 25383617641 - 2¹ = 25383617639 is a prime.

Together with 25383617639, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 25383617591 and 25383617600.

It is not a weakly prime, because it can be changed into another prime (25383617681) 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 as a sum of consecutive naturals, namely, 12691808820 + 12691808821.

It is an arithmetic number, because the mean of its divisors is an integer number (12691808821).

Almost surely, 2^25383617641 is an apocalyptic number.

It is an amenable number.

25383617641 is a deficient number, since it is larger than the sum of its proper divisors (1).

25383617641 is an equidigital number, since it uses as much as digits as its factorization.

25383617641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 46.

The spelling of 25383617641 in words is "twenty-five billion, three hundred eighty-three million, six hundred seventeen thousand, six hundred forty-one".