1440665118720 has 288 divisors, whose sum is σ = 5178024502560. Its totient is φ = 384176701440.

The previous prime is 1440665118719. The next prime is 1440665118721. The reversal of 1440665118720 is 278115660441.

1440665118720 is a `hidden beast` number, since 1 + 4 + 4 + 0 + 66 + 511 + 8 + 72 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1440665118719) and next prime (1440665118721).

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1440665118721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2198835 + ... + 2777805.

It is an arithmetic number, because the mean of its divisors is an integer number (17979251745).

Almost surely, 2^{1440665118720} is an apocalyptic number.

1440665118720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1440665118720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2589012251280).

1440665118720 is an abundant number, since it is smaller than the sum of its proper divisors (3737359383840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1440665118720 is an frugal number, since it uses more digits than its factorization.

1440665118720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579013 (or 578981 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 1440665118720 in words is "one trillion, four hundred forty billion, six hundred sixty-five million, one hundred eighteen thousand, seven hundred twenty".