12178682349 has 16 divisors (see below), whose sum is σ = 16685437632. Its totient is φ = 7895743488.

The previous prime is 12178682317. The next prime is 12178682357. The reversal of 12178682349 is 94328687121.

It is a happy number.

It is not a de Polignac number, because 12178682349 - 2⁵ = 12178682317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12178682389) 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 15 ways as a sum of consecutive naturals, for example, 204877 + ... + 257549.

It is an arithmetic number, because the mean of its divisors is an integer number (1042839852).

Almost surely, 2^12178682349 is an apocalyptic number.

It is an amenable number.

12178682349 is a deficient number, since it is larger than the sum of its proper divisors (4506755283).

12178682349 is a wasteful number, since it uses less digits than its factorization.

12178682349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54796.

The product of its digits is 1161216, while the sum is 51.

The spelling of 12178682349 in words is "twelve billion, one hundred seventy-eight million, six hundred eighty-two thousand, three hundred forty-nine".