1181065778123 has 32 divisors (see below), whose sum is σ = 1534517913600. Its totient is φ = 900729775680.

The previous prime is 1181065778111. The next prime is 1181065778239. The reversal of 1181065778123 is 3218775601811.

It is not a de Polignac number, because 1181065778123 - 2²⁴ = 1181049000907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1181065778723) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3152786 + ... + 3507447.

It is an arithmetic number, because the mean of its divisors is an integer number (47953684800).

Almost surely, 2^{1181065778123} is an apocalyptic number.

1181065778123 is a deficient number, since it is larger than the sum of its proper divisors (353452135477).

1181065778123 is an equidigital number, since it uses as much as digits as its factorization.

1181065778123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6660312 (or 6660298 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 50.

The spelling of 1181065778123 in words is "one trillion, one hundred eighty-one billion, sixty-five million, seven hundred seventy-eight thousand, one hundred twenty-three".