1440455453 has 4 divisors (see below), whose sum is σ = 1440532800. Its totient is φ = 1440378108.

The previous prime is 1440455449. The next prime is 1440455459. The reversal of 1440455453 is 3545540441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3545540441 = 25609 ⋅138449.

It is a cyclic number.

It is not a de Polignac number, because 1440455453 - 2² = 1440455449 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440455459) 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 in 3 ways as a sum of consecutive naturals, for example, 8198 + ... + 54296.

It is an arithmetic number, because the mean of its divisors is an integer number (360133200).

Almost surely, 2^1440455453 is an apocalyptic number.

It is an amenable number.

1440455453 is a deficient number, since it is larger than the sum of its proper divisors (77347).

1440455453 is an equidigital number, since it uses as much as digits as its factorization.

1440455453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77346.

The product of its (nonzero) digits is 96000, while the sum is 35.

The square root of 1440455453 is about 37953.3325677733. The cubic root of 1440455453 is about 1129.3622770194.

Adding to 1440455453 its reverse (3545540441), we get a palindrome (4985995894).

The spelling of 1440455453 in words is "one billion, four hundred forty million, four hundred fifty-five thousand, four hundred fifty-three".