25316887109 has 2 divisors, whose sum is σ = 25316887110. Its totient is φ = 25316887108.

The previous prime is 25316887081. The next prime is 25316887111. The reversal of 25316887109 is 90178861352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25287996484 + 28890625 = 159022^2 + 5375^2 .

It is a cyclic number.

It is not a de Polignac number, because 25316887109 - 2³² = 21021919813 is a prime.

Together with 25316887111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25316887199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12658443554 + 12658443555.

It is an arithmetic number, because the mean of its divisors is an integer number (12658443555).

Almost surely, 2^25316887109 is an apocalyptic number.

It is an amenable number.

25316887109 is a deficient number, since it is larger than the sum of its proper divisors (1).

25316887109 is an equidigital number, since it uses as much as digits as its factorization.

25316887109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 25316887109 in words is "twenty-five billion, three hundred sixteen million, eight hundred eighty-seven thousand, one hundred nine".