1440044432321 has 4 divisors (see below), whose sum is σ = 1570957562544. Its totient is φ = 1309131302100.

The previous prime is 1440044432317. The next prime is 1440044432363. The reversal of 1440044432321 is 1232344400441.

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.

It is a cyclic number.

It is not a de Polignac number, because 1440044432321 - 2² = 1440044432317 is a prime.

It is a super-3 number, since 3×1440044432321³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1440044432821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65456565095 + ... + 65456565116.

It is an arithmetic number, because the mean of its divisors is an integer number (392739390636).

Almost surely, 2^{1440044432321} is an apocalyptic number.

1440044432321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1440044432321 is a deficient number, since it is larger than the sum of its proper divisors (130913130223).

1440044432321 is a wasteful number, since it uses less digits than its factorization.

1440044432321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130913130222.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 1440044432321 its reverse (1232344400441), we get a palindrome (2672388832762).

The spelling of 1440044432321 in words is "one trillion, four hundred forty billion, forty-four million, four hundred thirty-two thousand, three hundred twenty-one".