12181309519 has 8 divisors (see below), whose sum is σ = 12722847840. Its totient is φ = 11640764256.

The previous prime is 12181309513. The next prime is 12181309531. The reversal of 12181309519 is 91590318121.

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

It is a cyclic number.

It is not a de Polignac number, because 12181309519 - 2¹¹ = 12181307471 is a prime.

It is a super-3 number, since 3×12181309519³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12181309513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223132 + ... + 272305.

It is an arithmetic number, because the mean of its divisors is an integer number (1590355980).

Almost surely, 2^12181309519 is an apocalyptic number.

12181309519 is a deficient number, since it is larger than the sum of its proper divisors (541538321).

12181309519 is a wasteful number, since it uses less digits than its factorization.

12181309519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496529.

The product of its (nonzero) digits is 19440, while the sum is 40.

The spelling of 12181309519 in words is "twelve billion, one hundred eighty-one million, three hundred nine thousand, five hundred nineteen".