1440271765649 has 2 divisors, whose sum is σ = 1440271765650. Its totient is φ = 1440271765648.

The previous prime is 1440271765619. The next prime is 1440271765651. The reversal of 1440271765649 is 9465671720441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1366252401424 + 74019364225 = 1168868^2 + 272065^2 .

It is a cyclic number.

It is not a de Polignac number, because 1440271765649 - 2⁸ = 1440271765393 is a prime.

Together with 1440271765651, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1440271765594 and 1440271765603.

It is not a weakly prime, because it can be changed into another prime (1440271765619) 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, 720135882824 + 720135882825.

It is an arithmetic number, because the mean of its divisors is an integer number (720135882825).

Almost surely, 2^{1440271765649} is an apocalyptic number.

It is an amenable number.

1440271765649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440271765649 is an equidigital number, since it uses as much as digits as its factorization.

1440271765649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10160640, while the sum is 56.

The spelling of 1440271765649 in words is "one trillion, four hundred forty billion, two hundred seventy-one million, seven hundred sixty-five thousand, six hundred forty-nine".