1440432320431 has 16 divisors (see below), whose sum is σ = 1580988326400. Its totient is φ = 1304315036640.

The previous prime is 1440432320389. The next prime is 1440432320479. The reversal of 1440432320431 is 1340232340441.

It is a cyclic number.

It is not a de Polignac number, because 1440432320431 - 2¹³ = 1440432312239 is a prime.

It is a super-2 number, since 2×1440432320431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1440432320393 and 1440432320402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440432720431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3737425 + ... + 4104778.

It is an arithmetic number, because the mean of its divisors is an integer number (98811770400).

Almost surely, 2^{1440432320431} is an apocalyptic number.

1440432320431 is a deficient number, since it is larger than the sum of its proper divisors (140556005969).

1440432320431 is a wasteful number, since it uses less digits than its factorization.

1440432320431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7842486.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 1440432320431 its reverse (1340232340441), we get a palindrome (2780664660872).

The spelling of 1440432320431 in words is "one trillion, four hundred forty billion, four hundred thirty-two million, three hundred twenty thousand, four hundred thirty-one".