40568853509 has 2 divisors, whose sum is σ = 40568853510. Its totient is φ = 40568853508.

The previous prime is 40568853497. The next prime is 40568853511. The reversal of 40568853509 is 90535886504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36728572609 + 3840280900 = 191647^2 + 61970^2 .

It is a cyclic number.

It is not a de Polignac number, because 40568853509 - 2⁸ = 40568853253 is a prime.

It is a super-2 number, since 2×40568853509² (a number of 22 digits) contains 22 as substring.

Together with 40568853511, 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 (40568853529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20284426754 + 20284426755.

It is an arithmetic number, because the mean of its divisors is an integer number (20284426755).

Almost surely, 2^40568853509 is an apocalyptic number.

It is an amenable number.

40568853509 is a deficient number, since it is larger than the sum of its proper divisors (1).

40568853509 is an equidigital number, since it uses as much as digits as its factorization.

40568853509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184000, while the sum is 53.

The spelling of 40568853509 in words is "forty billion, five hundred sixty-eight million, eight hundred fifty-three thousand, five hundred nine".