12178221662 has 16 divisors (see below), whose sum is σ = 19407980160. Its totient is φ = 5720244768.

The previous prime is 12178221647. The next prime is 12178221667. The reversal of 12178221662 is 26612287121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12178221667) 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 7 ways as a sum of consecutive naturals, for example, 2835278 + ... + 2839569.

It is an arithmetic number, because the mean of its divisors is an integer number (1212998760).

Almost surely, 2^12178221662 is an apocalyptic number.

12178221662 is a deficient number, since it is larger than the sum of its proper divisors (7229758498).

12178221662 is a wasteful number, since it uses less digits than its factorization.

12178221662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5674915.

The product of its digits is 32256, while the sum is 38.

The spelling of 12178221662 in words is "twelve billion, one hundred seventy-eight million, two hundred twenty-one thousand, six hundred sixty-two".