1189381218493 has 16 divisors (see below), whose sum is σ = 1343946554496. Its totient is φ = 1044353977920.

The previous prime is 1189381218463. The next prime is 1189381218497. The reversal of 1189381218493 is 3948121839811.

It is a cyclic number.

It is not a de Polignac number, because 1189381218493 - 2¹³ = 1189381210301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189381218497) 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 15 ways as a sum of consecutive naturals, for example, 10934455 + ... + 11042692.

It is an arithmetic number, because the mean of its divisors is an integer number (83996659656).

Almost surely, 2^{1189381218493} is an apocalyptic number.

1189381218493 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1189381218493 is a deficient number, since it is larger than the sum of its proper divisors (154565336003).

1189381218493 is a wasteful number, since it uses less digits than its factorization.

1189381218493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21977364.

The product of its digits is 2985984, while the sum is 58.

The spelling of 1189381218493 in words is "one trillion, one hundred eighty-nine billion, three hundred eighty-one million, two hundred eighteen thousand, four hundred ninety-three".