40338987163 has 2 divisors, whose sum is σ = 40338987164. Its totient is φ = 40338987162.

The previous prime is 40338987151. The next prime is 40338987193. The reversal of 40338987163 is 36178983304.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40338987163 - 2⁹ = 40338986651 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40338987163.

It is not a weakly prime, because it can be changed into another prime (40338987113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20169493581 + 20169493582.

It is an arithmetic number, because the mean of its divisors is an integer number (20169493582).

Almost surely, 2^40338987163 is an apocalyptic number.

40338987163 is a deficient number, since it is larger than the sum of its proper divisors (1).

40338987163 is an equidigital number, since it uses as much as digits as its factorization.

40338987163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 40338987163 in words is "forty billion, three hundred thirty-eight million, nine hundred eighty-seven thousand, one hundred sixty-three".