1389009539205 has 24 divisors (see below), whose sum is σ = 2407714103808. Its totient is φ = 740775066336.

The previous prime is 1389009539201. The next prime is 1389009539243. The reversal of 1389009539205 is 5029359009831.

1389009539205 is a `hidden beast` number, since 1 + 3 + 89 + 0 + 0 + 9 + 539 + 20 + 5 = 666.

It is not a de Polignac number, because 1389009539205 - 2² = 1389009539201 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389009539201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 520384 + ... + 1746086.

It is an arithmetic number, because the mean of its divisors is an integer number (100321420992).

Almost surely, 2^{1389009539205} is an apocalyptic number.

1389009539205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1389009539205 is a deficient number, since it is larger than the sum of its proper divisors (1018704564603).

1389009539205 is a wasteful number, since it uses less digits than its factorization.

1389009539205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250897 (or 1250894 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 54.

The spelling of 1389009539205 in words is "one trillion, three hundred eighty-nine billion, nine million, five hundred thirty-nine thousand, two hundred five".