1440344021413 has 32 divisors (see below), whose sum is σ = 1616378227200. Its totient is φ = 1272156580800.

The previous prime is 1440344021411. The next prime is 1440344021429. The reversal of 1440344021413 is 3141204430441.

It is a cyclic number.

It is not a de Polignac number, because 1440344021413 - 2¹ = 1440344021411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440344021411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 245412643 + ... + 245418511.

It is an arithmetic number, because the mean of its divisors is an integer number (50511819600).

Almost surely, 2^{1440344021413} is an apocalyptic number.

It is an amenable number.

1440344021413 is a deficient number, since it is larger than the sum of its proper divisors (176034205787).

1440344021413 is a wasteful number, since it uses less digits than its factorization.

1440344021413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8593.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 1440344021413 its reverse (3141204430441), we get a palindrome (4581548451854).

The spelling of 1440344021413 in words is "one trillion, four hundred forty billion, three hundred forty-four million, twenty-one thousand, four hundred thirteen".