12181255774 has 8 divisors (see below), whose sum is σ = 18696811320. Its totient is φ = 5948985336.

The previous prime is 12181255771. The next prime is 12181255783. The reversal of 12181255774 is 47755218121.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a self number, because there is not a number n which added to its sum of digits gives 12181255774.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12181255771) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 70821169 + ... + 70821340.

It is an arithmetic number, because the mean of its divisors is an integer number (2337101415).

Almost surely, 2^12181255774 is an apocalyptic number.

12181255774 is a deficient number, since it is larger than the sum of its proper divisors (6515555546).

12181255774 is a wasteful number, since it uses less digits than its factorization.

12181255774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141642554.

The product of its digits is 156800, while the sum is 43.

The spelling of 12181255774 in words is "twelve billion, one hundred eighty-one million, two hundred fifty-five thousand, seven hundred seventy-four".