12181664730 has 32 divisors (see below), whose sum is σ = 29283732864. Its totient is φ = 3243139776.

The previous prime is 12181664723. The next prime is 12181664773. The reversal of 12181664730 is 3746618121.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 312814 + ... + 349593.

It is an arithmetic number, because the mean of its divisors is an integer number (915116652).

Almost surely, 2^12181664730 is an apocalyptic number.

12181664730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12181664730 is an abundant number, since it is smaller than the sum of its proper divisors (17102068134).

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

12181664730 is a wasteful number, since it uses less digits than its factorization.

12181664730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663030.

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 12181664730 in words is "twelve billion, one hundred eighty-one million, six hundred sixty-four thousand, seven hundred thirty".