1440120321423 has 48 divisors (see below), whose sum is σ = 2405645948160. Its totient is φ = 813140456832.

The previous prime is 1440120321401. The next prime is 1440120321443. The reversal of 1440120321423 is 3241230210441.

1440120321423 is a `hidden beast` number, since 1 + 4 + 401 + 20 + 3 + 214 + 23 = 666.

It is not a de Polignac number, because 1440120321423 - 2¹³ = 1440120313231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440120321443) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8455140 + ... + 8623782.

It is an arithmetic number, because the mean of its divisors is an integer number (50117623920).

Almost surely, 2^{1440120321423} is an apocalyptic number.

1440120321423 is a deficient number, since it is larger than the sum of its proper divisors (965525626737).

1440120321423 is a wasteful number, since it uses less digits than its factorization.

1440120321423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170268 (or 170265 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 1440120321423 its reverse (3241230210441), we get a palindrome (4681350531864).

The spelling of 1440120321423 in words is "one trillion, four hundred forty billion, one hundred twenty million, three hundred twenty-one thousand, four hundred twenty-three".