1440455121449 has 2 divisors, whose sum is σ = 1440455121450. Its totient is φ = 1440455121448.

The previous prime is 1440455121433. The next prime is 1440455121481. The reversal of 1440455121449 is 9441215540441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 819894030400 + 620561091049 = 905480^2 + 787757^2 .

It is an emirp because it is prime and its reverse (9441215540441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1440455121449 - 2⁴ = 1440455121433 is a prime.

It is not a weakly prime, because it can be changed into another prime (1440455121419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720227560724 + 720227560725.

It is an arithmetic number, because the mean of its divisors is an integer number (720227560725).

Almost surely, 2^{1440455121449} is an apocalyptic number.

It is an amenable number.

1440455121449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440455121449 is an equidigital number, since it uses as much as digits as its factorization.

1440455121449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 460800, while the sum is 44.

The spelling of 1440455121449 in words is "one trillion, four hundred forty billion, four hundred fifty-five million, one hundred twenty-one thousand, four hundred forty-nine".