12642789204 has 48 divisors (see below), whose sum is σ = 32783667840. Its totient is φ = 4213483200.

The previous prime is 12642789199. The next prime is 12642789209. The reversal of 12642789204 is 40298724621.

12642789204 is a `hidden beast` number, since 12 + 6 + 427 + 8 + 9 + 204 = 666.

12642789204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12642789199) and next prime (12642789209).

It is a self number, because there is not a number n which added to its sum of digits gives 12642789204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12642789209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1108129 + ... + 1119479.

It is an arithmetic number, because the mean of its divisors is an integer number (682993080).

Almost surely, 2^12642789204 is an apocalyptic number.

It is an amenable number.

12642789204 is an abundant number, since it is smaller than the sum of its proper divisors (20140878636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12642789204 is a wasteful number, since it uses less digits than its factorization.

12642789204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21677 (or 21669 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 12642789204 in words is "twelve billion, six hundred forty-two million, seven hundred eighty-nine thousand, two hundred four".