11725826209 has 2 divisors, whose sum is σ = 11725826210. Its totient is φ = 11725826208.

The previous prime is 11725826207. The next prime is 11725826237. The reversal of 11725826209 is 90262852711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11161288609 + 564537600 = 105647^2 + 23760^2 .

It is a cyclic number.

It is not a de Polignac number, because 11725826209 - 2¹ = 11725826207 is a prime.

Together with 11725826207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11725826207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5862913104 + 5862913105.

It is an arithmetic number, because the mean of its divisors is an integer number (5862913105).

Almost surely, 2^11725826209 is an apocalyptic number.

It is an amenable number.

11725826209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11725826209 is an equidigital number, since it uses as much as digits as its factorization.

11725826209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 11725826209 in words is "eleven billion, seven hundred twenty-five million, eight hundred twenty-six thousand, two hundred nine".