1340336437481 has 2 divisors, whose sum is σ = 1340336437482. Its totient is φ = 1340336437480.

The previous prime is 1340336437459. The next prime is 1340336437487. The reversal of 1340336437481 is 1847346330431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1319089002256 + 21247435225 = 1148516^2 + 145765^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1340336437481 is a prime.

It is a super-2 number, since 2×1340336437481² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1340336437487) 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, 670168218740 + 670168218741.

It is an arithmetic number, because the mean of its divisors is an integer number (670168218741).

Almost surely, 2^{1340336437481} is an apocalyptic number.

It is an amenable number.

1340336437481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340336437481 is an equidigital number, since it uses as much as digits as its factorization.

1340336437481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 47.

The spelling of 1340336437481 in words is "one trillion, three hundred forty billion, three hundred thirty-six million, four hundred thirty-seven thousand, four hundred eighty-one".