1389497911191 has 12 divisors (see below), whose sum is σ = 2161441195368. Its totient is φ = 855075637584.

The previous prime is 1389497911183. The next prime is 1389497911201. The reversal of 1389497911191 is 1911197949831.

1389497911191 is a `hidden beast` number, since 138 + 9 + 497 + 9 + 1 + 1 + 1 + 9 + 1 = 666.

It is not a de Polignac number, because 1389497911191 - 2³ = 1389497911183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389497911391) 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 11 ways as a sum of consecutive naturals, for example, 5938025145 + ... + 5938025378.

It is an arithmetic number, because the mean of its divisors is an integer number (180120099614).

Almost surely, 2^{1389497911191} is an apocalyptic number.

1389497911191 is a deficient number, since it is larger than the sum of its proper divisors (771943284177).

1389497911191 is a wasteful number, since it uses less digits than its factorization.

1389497911191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11876050542 (or 11876050539 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 63.

The spelling of 1389497911191 in words is "one trillion, three hundred eighty-nine billion, four hundred ninety-seven million, nine hundred eleven thousand, one hundred ninety-one".