25005307009 has 2 divisors, whose sum is σ = 25005307010. Its totient is φ = 25005307008.

The previous prime is 25005307007. The next prime is 25005307027. The reversal of 25005307009 is 90070350052.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23782266225 + 1223040784 = 154215^2 + 34972^2 .

It is a cyclic number.

It is not a de Polignac number, because 25005307009 - 2¹ = 25005307007 is a prime.

It is a super-2 number, since 2×25005307009² (a number of 22 digits) contains 22 as substring.

Together with 25005307007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25005307001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12502653504 + 12502653505.

It is an arithmetic number, because the mean of its divisors is an integer number (12502653505).

Almost surely, 2^25005307009 is an apocalyptic number.

It is an amenable number.

25005307009 is a deficient number, since it is larger than the sum of its proper divisors (1).

25005307009 is an equidigital number, since it uses as much as digits as its factorization.

25005307009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 31.

The spelling of 25005307009 in words is "twenty-five billion, five million, three hundred seven thousand, nine".