1027281821044 has 24 divisors (see below), whose sum is σ = 1842552256160. Its totient is φ = 500877294624.

The previous prime is 1027281820993. The next prime is 1027281821047. The reversal of 1027281821044 is 4401281827201.

It is a junction number, because it is equal to n+sod(n) for n = 1027281820988 and 1027281821006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1027281821047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4766154 + ... + 4977025.

Almost surely, 2^{1027281821044} is an apocalyptic number.

It is an amenable number.

1027281821044 is a deficient number, since it is larger than the sum of its proper divisors (815270435116).

1027281821044 is a wasteful number, since it uses less digits than its factorization.

1027281821044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9743839 (or 9743837 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 40.

The spelling of 1027281821044 in words is "one trillion, twenty-seven billion, two hundred eighty-one million, eight hundred twenty-one thousand, forty-four".