9725709464069 has 2 divisors, whose sum is σ = 9725709464070. Its totient is φ = 9725709464068.

The previous prime is 9725709464041. The next prime is 9725709464071. The reversal of 9725709464069 is 9604649075279.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5380256533444 + 4345452930625 = 2319538^2 + 2084575^2 .

It is a cyclic number.

It is not a de Polignac number, because 9725709464069 - 2⁴⁰ = 8626197836293 is a prime.

It is a super-2 number, since 2×9725709464069² (a number of 27 digits) contains 22 as substring.

Together with 9725709464071, 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 (9725709464039) 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, 4862854732034 + 4862854732035.

It is an arithmetic number, because the mean of its divisors is an integer number (4862854732035).

Almost surely, 2^{9725709464069} is an apocalyptic number.

It is an amenable number.

9725709464069 is a deficient number, since it is larger than the sum of its proper divisors (1).

9725709464069 is an equidigital number, since it uses as much as digits as its factorization.

9725709464069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 205752960, while the sum is 68.

The spelling of 9725709464069 in words is "nine trillion, seven hundred twenty-five billion, seven hundred nine million, four hundred sixty-four thousand, sixty-nine".