2144202543440 has 20 divisors (see below), whose sum is σ = 4985270913684. Its totient is φ = 857681017344.

The previous prime is 2144202543421. The next prime is 2144202543463. The reversal of 2144202543440 is 443452024412.

It can be written as a sum of positive squares in 2 ways, for example, as 673095539776 + 1471107003664 = 820424^2 + 1212892^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 2144202543440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13401265817 + ... + 13401265976.

Almost surely, 2^{2144202543440} is an apocalyptic number.

2144202543440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2144202543440 is an abundant number, since it is smaller than the sum of its proper divisors (2841068370244).

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

2144202543440 is a wasteful number, since it uses less digits than its factorization.

2144202543440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26802531806 (or 26802531800 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 35.

Adding to 2144202543440 its reverse (443452024412), we get a palindrome (2587654567852).

The spelling of 2144202543440 in words is "two trillion, one hundred forty-four billion, two hundred two million, five hundred forty-three thousand, four hundred forty".