1189381218492 has 48 divisors (see below), whose sum is σ = 2881855281312. Its totient is φ = 381492126720.

The previous prime is 1189381218463. The next prime is 1189381218497. The reversal of 1189381218492 is 2948121839811.

It is a happy number.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16521903 + ... + 16593734.

It is an arithmetic number, because the mean of its divisors is an integer number (60038651694).

Almost surely, 2^{1189381218492} is an apocalyptic number.

1189381218492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1189381218492 is an abundant number, since it is smaller than the sum of its proper divisors (1692474062820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1189381218492 is a wasteful number, since it uses less digits than its factorization.

1189381218492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33115758 (or 33115756 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 57.

It can be divided in two parts, 118938 and 1218492, that added together give a triangular number (1337430 = T₁₆₃₅).

The spelling of 1189381218492 in words is "one trillion, one hundred eighty-nine billion, three hundred eighty-one million, two hundred eighteen thousand, four hundred ninety-two".