40649228813 has 2 divisors, whose sum is σ = 40649228814. Its totient is φ = 40649228812.

The previous prime is 40649228791. The next prime is 40649228827. The reversal of 40649228813 is 31882294604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31768428169 + 8880800644 = 178237^2 + 94238^2 .

It is a cyclic number.

It is not a de Polignac number, because 40649228813 - 2⁶ = 40649228749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40649228713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20324614406 + 20324614407.

It is an arithmetic number, because the mean of its divisors is an integer number (20324614407).

Almost surely, 2^40649228813 is an apocalyptic number.

It is an amenable number.

40649228813 is a deficient number, since it is larger than the sum of its proper divisors (1).

40649228813 is an equidigital number, since it uses as much as digits as its factorization.

40649228813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 663552, while the sum is 47.

The spelling of 40649228813 in words is "forty billion, six hundred forty-nine million, two hundred twenty-eight thousand, eight hundred thirteen".