440135443453 has 6 divisors (see below), whose sum is σ = 455835876314. Its totient is φ = 424958358384.

The previous prime is 440135443439. The next prime is 440135443469. The reversal of 440135443453 is 354344531044.

It can be written as a sum of positive squares in 3 ways, for example, as 99334019929 + 340801423524 = 315173^2 + 583782^2 .

It is a de Polignac number, because none of the positive numbers 2^k-440135443453 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 (440135440453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 261673026 + ... + 261674707.

Almost surely, 2^440135443453 is an apocalyptic number.

It is an amenable number.

440135443453 is a deficient number, since it is larger than the sum of its proper divisors (15700432861).

440135443453 is an equidigital number, since it uses as much as digits as its factorization.

440135443453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523347791 (or 523347762 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 40.

Adding to 440135443453 its reverse (354344531044), we get a palindrome (794479974497).

The spelling of 440135443453 in words is "four hundred forty billion, one hundred thirty-five million, four hundred forty-three thousand, four hundred fifty-three".