181116193708209 has 8 divisors (see below), whose sum is σ = 242822447550592. Its totient is φ = 120077034502320.

The previous prime is 181116193708199. The next prime is 181116193708283. The reversal of 181116193708209 is 902807391611181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 181116193708209 - 2⁴ = 181116193708193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181116113708209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166773658489 + ... + 166773659574.

It is an arithmetic number, because the mean of its divisors is an integer number (30352805943824).

Almost surely, 2^{181116193708209} is an apocalyptic number.

It is an amenable number.

181116193708209 is a deficient number, since it is larger than the sum of its proper divisors (61706253842383).

181116193708209 is a wasteful number, since it uses less digits than its factorization.

181116193708209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333547318247.

The product of its (nonzero) digits is 1306368, while the sum is 57.

The spelling of 181116193708209 in words is "one hundred eighty-one trillion, one hundred sixteen billion, one hundred ninety-three million, seven hundred eight thousand, two hundred nine".