40326985813 has 2 divisors, whose sum is σ = 40326985814. Its totient is φ = 40326985812.

The previous prime is 40326985801. The next prime is 40326985843. The reversal of 40326985813 is 31858962304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25331268964 + 14995716849 = 159158^2 + 122457^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40326985813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40326985843) 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, 20163492906 + 20163492907.

It is an arithmetic number, because the mean of its divisors is an integer number (20163492907).

Almost surely, 2^40326985813 is an apocalyptic number.

It is an amenable number.

40326985813 is a deficient number, since it is larger than the sum of its proper divisors (1).

40326985813 is an equidigital number, since it uses as much as digits as its factorization.

40326985813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 40326985813 in words is "forty billion, three hundred twenty-six million, nine hundred eighty-five thousand, eight hundred thirteen".