39945168843 has 16 divisors (see below), whose sum is σ = 54679401216. Its totient is φ = 25928196320.

The previous prime is 39945168841. The next prime is 39945168853. The reversal of 39945168843 is 34886154993.

It is a cyclic number.

It is not a de Polignac number, because 39945168843 - 2¹ = 39945168841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39945168841) 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, 938055 + ... + 979712.

It is an arithmetic number, because the mean of its divisors is an integer number (3417462576).

Almost surely, 2^39945168843 is an apocalyptic number.

39945168843 is a deficient number, since it is larger than the sum of its proper divisors (14734232373).

39945168843 is a wasteful number, since it uses less digits than its factorization.

39945168843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1917954.

The product of its digits is 22394880, while the sum is 60.

The spelling of 39945168843 in words is "thirty-nine billion, nine hundred forty-five million, one hundred sixty-eight thousand, eight hundred forty-three".