1189811974439 has 8 divisors (see below), whose sum is σ = 1298242900368. Its totient is φ = 1081425415360.

The previous prime is 1189811974331. The next prime is 1189811974457. The reversal of 1189811974439 is 9344791189811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1189811974439 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 (1189811974469) 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, 11035622 + ... + 11142915.

It is an arithmetic number, because the mean of its divisors is an integer number (162280362546).

Almost surely, 2^{1189811974439} is an apocalyptic number.

1189811974439 is a deficient number, since it is larger than the sum of its proper divisors (108430925929).

1189811974439 is a wasteful number, since it uses less digits than its factorization.

1189811974439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22183425.

The product of its digits is 15676416, while the sum is 65.

The spelling of 1189811974439 in words is "one trillion, one hundred eighty-nine billion, eight hundred eleven million, nine hundred seventy-four thousand, four hundred thirty-nine".