1444040665640 has 64 divisors (see below), whose sum is σ = 3343263759360. Its totient is φ = 561000890880.

The previous prime is 1444040665601. The next prime is 1444040665649. The reversal of 1444040665640 is 465660404441.

It is a junction number, because it is equal to n+sod(n) for n = 1444040665591 and 1444040665600.

It is not an unprimeable number, because it can be changed into a prime (1444040665649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1608524 + ... + 2339963.

It is an arithmetic number, because the mean of its divisors is an integer number (52238496240).

Almost surely, 2^{1444040665640} is an apocalyptic number.

1444040665640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1444040665640 is an abundant number, since it is smaller than the sum of its proper divisors (1899223093720).

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

1444040665640 is a wasteful number, since it uses less digits than its factorization.

1444040665640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3948762 (or 3948758 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 44.

The spelling of 1444040665640 in words is "one trillion, four hundred forty-four billion, forty million, six hundred sixty-five thousand, six hundred forty".