40685909207 has 2 divisors, whose sum is σ = 40685909208. Its totient is φ = 40685909206.

The previous prime is 40685909203. The next prime is 40685909213. The reversal of 40685909207 is 70290958604.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40685909207 - 2² = 40685909203 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40685909203) 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, 20342954603 + 20342954604.

It is an arithmetic number, because the mean of its divisors is an integer number (20342954604).

Almost surely, 2^40685909207 is an apocalyptic number.

40685909207 is a deficient number, since it is larger than the sum of its proper divisors (1).

40685909207 is an equidigital number, since it uses as much as digits as its factorization.

40685909207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 40685909207 in words is "forty billion, six hundred eighty-five million, nine hundred nine thousand, two hundred seven".