1444431131440 has 40 divisors (see below), whose sum is σ = 3663602599248. Its totient is φ = 525247683840.

The previous prime is 1444431131359. The next prime is 1444431131491. The reversal of 1444431131440 is 441311344441.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 1444431131396 and 1444431131405.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 820698627 + ... + 820700386.

Almost surely, 2^{1444431131440} is an apocalyptic number.

1444431131440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1444431131440 is an abundant number, since it is smaller than the sum of its proper divisors (2219171467808).

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

1444431131440 is a wasteful number, since it uses less digits than its factorization.

1444431131440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641399037 (or 1641399031 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

Adding to 1444431131440 its reverse (441311344441), we get a palindrome (1885742475881).

The spelling of 1444431131440 in words is "one trillion, four hundred forty-four billion, four hundred thirty-one million, one hundred thirty-one thousand, four hundred forty".