1189280973666 has 64 divisors (see below), whose sum is σ = 2500437316608. Its totient is φ = 376625204928.

The previous prime is 1189280973659. The next prime is 1189280973667. The reversal of 1189280973666 is 6663790829811.

It is a junction number, because it is equal to n+sod(n) for n = 1189280973597 and 1189280973606.

It is not an unprimeable number, because it can be changed into a prime (1189280973667) 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 31 ways as a sum of consecutive naturals, for example, 33651081 + ... + 33686403.

It is an arithmetic number, because the mean of its divisors is an integer number (39069333072).

Almost surely, 2^{1189280973666} is an apocalyptic number.

1189280973666 is an abundant number, since it is smaller than the sum of its proper divisors (1311156342942).

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

1189280973666 is a wasteful number, since it uses less digits than its factorization.

1189280973666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38935.

The product of its (nonzero) digits is 47029248, while the sum is 66.

The spelling of 1189280973666 in words is "one trillion, one hundred eighty-nine billion, two hundred eighty million, nine hundred seventy-three thousand, six hundred sixty-six".