1821744322944 has 128 divisors (see below), whose sum is σ = 5955702708480. Its totient is φ = 480460032000.

The previous prime is 1821744322943. The next prime is 1821744323027. The reversal of 1821744322944 is 4492234471281.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1821744322943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26031682 + ... + 26101569.

It is an arithmetic number, because the mean of its divisors is an integer number (46528927410).

Almost surely, 2^{1821744322944} is an apocalyptic number.

1821744322944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1821744322944 is an abundant number, since it is smaller than the sum of its proper divisors (4133958385536).

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

1821744322944 is a wasteful number, since it uses less digits than its factorization.

1821744322944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52133288 (or 52133276 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 51.

The spelling of 1821744322944 in words is "one trillion, eight hundred twenty-one billion, seven hundred forty-four million, three hundred twenty-two thousand, nine hundred forty-four".