12085708779 has 6 divisors (see below), whose sum is σ = 17457134916. Its totient is φ = 8057139180.

The previous prime is 12085708769. The next prime is 12085708787. The reversal of 12085708779 is 97780758021.

It is a happy number.

It is not a de Polignac number, because 12085708779 - 2¹⁵ = 12085676011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12085708759) 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 5 ways as a sum of consecutive naturals, for example, 671428257 + ... + 671428274.

It is an arithmetic number, because the mean of its divisors is an integer number (2909522486).

Almost surely, 2^12085708779 is an apocalyptic number.

12085708779 is a deficient number, since it is larger than the sum of its proper divisors (5371426137).

12085708779 is a wasteful number, since it uses less digits than its factorization.

12085708779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342856537 (or 1342856534 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 54.

The spelling of 12085708779 in words is "twelve billion, eighty-five million, seven hundred eight thousand, seven hundred seventy-nine".