1189066550369 has 4 divisors (see below), whose sum is σ = 1190187255060. Its totient is φ = 1187945845680.

The previous prime is 1189066550363. The next prime is 1189066550401. The reversal of 1189066550369 is 9630556609811.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 939226524769 + 249840025600 = 969137^2 + 499840^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1189066550369 is a prime.

It is a super-2 number, since 2×1189066550369² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1189066550363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560350754 + ... + 560352875.

It is an arithmetic number, because the mean of its divisors is an integer number (297546813765).

Almost surely, 2^{1189066550369} is an apocalyptic number.

It is an amenable number.

1189066550369 is a deficient number, since it is larger than the sum of its proper divisors (1120704691).

1189066550369 is a wasteful number, since it uses less digits than its factorization.

1189066550369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120704690.

The product of its (nonzero) digits is 10497600, while the sum is 59.

The spelling of 1189066550369 in words is "one trillion, one hundred eighty-nine billion, sixty-six million, five hundred fifty thousand, three hundred sixty-nine".