1340402031643 has 2 divisors, whose sum is σ = 1340402031644. Its totient is φ = 1340402031642.

The previous prime is 1340402031641. The next prime is 1340402031667. The reversal of 1340402031643 is 3461302040431.

It is a weak prime.

It is an emirp because it is prime and its reverse (3461302040431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1340402031643 - 2¹ = 1340402031641 is a prime.

Together with 1340402031641, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1340402031641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670201015821 + 670201015822.

It is an arithmetic number, because the mean of its divisors is an integer number (670201015822).

Almost surely, 2^{1340402031643} is an apocalyptic number.

1340402031643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340402031643 is an equidigital number, since it uses as much as digits as its factorization.

1340402031643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 31.

The spelling of 1340402031643 in words is "one trillion, three hundred forty billion, four hundred two million, thirty-one thousand, six hundred forty-three".