1944338393389 has 32 divisors (see below), whose sum is σ = 2290754359296. Its totient is φ = 1615816762560.

The previous prime is 1944338393329. The next prime is 1944338393399. The reversal of 1944338393389 is 9833938334491.

It is not a de Polignac number, because 1944338393389 - 2¹¹ = 1944338391341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1944338393329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17040282 + ... + 17154004.

It is an arithmetic number, because the mean of its divisors is an integer number (71586073728).

Almost surely, 2^{1944338393389} is an apocalyptic number.

It is an amenable number.

1944338393389 is a deficient number, since it is larger than the sum of its proper divisors (346415965907).

1944338393389 is a wasteful number, since it uses less digits than its factorization.

1944338393389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114265.

The product of its digits is 181398528, while the sum is 67.

The spelling of 1944338393389 in words is "one trillion, nine hundred forty-four billion, three hundred thirty-eight million, three hundred ninety-three thousand, three hundred eighty-nine".