12720753818 has 16 divisors (see below), whose sum is σ = 19166127936. Its totient is φ = 6332096160.

The previous prime is 12720753817. The next prime is 12720753827. The reversal of 12720753818 is 81835702721.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12720753817) 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, 502853 + ... + 527543.

It is an arithmetic number, because the mean of its divisors is an integer number (1197882996).

Almost surely, 2^12720753818 is an apocalyptic number.

12720753818 is a deficient number, since it is larger than the sum of its proper divisors (6445374118).

12720753818 is a wasteful number, since it uses less digits than its factorization.

12720753818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25829.

The product of its (nonzero) digits is 188160, while the sum is 44.

The spelling of 12720753818 in words is "twelve billion, seven hundred twenty million, seven hundred fifty-three thousand, eight hundred eighteen".