1644044452244 has 24 divisors (see below), whose sum is σ = 2905667347968. Its totient is φ = 813854362400.

The previous prime is 1644044452241. The next prime is 1644044452283. The reversal of 1644044452244 is 4422544404461.

It is a super-3 number, since 3×1644044452244³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1644044452195 and 1644044452204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1644044452241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15285077 + ... + 15392259.

It is an arithmetic number, because the mean of its divisors is an integer number (121069472832).

Almost surely, 2^{1644044452244} is an apocalyptic number.

It is an amenable number.

1644044452244 is a deficient number, since it is larger than the sum of its proper divisors (1261622895724).

1644044452244 is a wasteful number, since it uses less digits than its factorization.

1644044452244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145255 (or 145253 counting only the distinct ones).

The product of its (nonzero) digits is 1966080, while the sum is 44.

The spelling of 1644044452244 in words is "one trillion, six hundred forty-four billion, forty-four million, four hundred fifty-two thousand, two hundred forty-four".