12606978789 has 6 divisors (see below), whose sum is σ = 18210080486. Its totient is φ = 8404652520.

The previous prime is 12606978739. The next prime is 12606978793. The reversal of 12606978789 is 98787960621.

12606978789 is a `hidden beast` number, since 12 + 606 + 9 + 7 + 8 + 7 + 8 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12032993025 + 573985764 = 109695^2 + 23958^2 .

It is not a de Polignac number, because 12606978789 - 2⁹ = 12606978277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12606978739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 700387702 + ... + 700387719.

Almost surely, 2^12606978789 is an apocalyptic number.

It is an amenable number.

12606978789 is a deficient number, since it is larger than the sum of its proper divisors (5603101697).

12606978789 is a wasteful number, since it uses less digits than its factorization.

12606978789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400775427 (or 1400775424 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 63.

The spelling of 12606978789 in words is "twelve billion, six hundred six million, nine hundred seventy-eight thousand, seven hundred eighty-nine".