40001366342489 has 2 divisors, whose sum is σ = 40001366342490. Its totient is φ = 40001366342488.

The previous prime is 40001366342477. The next prime is 40001366342507. The reversal of 40001366342489 is 98424366310004.

40001366342489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36242711716864 + 3758654625625 = 6020192^2 + 1938725^2 .

It is a cyclic number.

It is not a de Polignac number, because 40001366342489 - 2⁴ = 40001366342473 is a prime.

It is not a weakly prime, because it can be changed into another prime (40001366342089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20000683171244 + 20000683171245.

It is an arithmetic number, because the mean of its divisors is an integer number (20000683171245).

Almost surely, 2^{40001366342489} is an apocalyptic number.

It is an amenable number.

40001366342489 is a deficient number, since it is larger than the sum of its proper divisors (1).

40001366342489 is an equidigital number, since it uses as much as digits as its factorization.

40001366342489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2985984, while the sum is 50.

The spelling of 40001366342489 in words is "forty trillion, one billion, three hundred sixty-six million, three hundred forty-two thousand, four hundred eighty-nine".