12187049678 has 16 divisors (see below), whose sum is σ = 18560045376. Its totient is φ = 6000629760.

The previous prime is 12187049671. The next prime is 12187049687. The reversal of 12187049678 is 87694078121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12187049671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28475 + ... + 158697.

It is an arithmetic number, because the mean of its divisors is an integer number (1160002836).

Almost surely, 2^12187049678 is an apocalyptic number.

12187049678 is a deficient number, since it is larger than the sum of its proper divisors (6372995698).

12187049678 is a wasteful number, since it uses less digits than its factorization.

12187049678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130939.

The product of its (nonzero) digits is 1354752, while the sum is 53.

The spelling of 12187049678 in words is "twelve billion, one hundred eighty-seven million, forty-nine thousand, six hundred seventy-eight".