12116786605 has 32 divisors (see below), whose sum is σ = 18549577728. Its totient is φ = 7377652800.

The previous prime is 12116786599. The next prime is 12116786629. The reversal of 12116786605 is 50668761121.

It is not a de Polignac number, because 12116786605 - 2⁷ = 12116786477 is a prime.

It is a super-2 number, since 2×12116786605² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 349401 + ... + 382510.

It is an arithmetic number, because the mean of its divisors is an integer number (579674304).

Almost surely, 2^12116786605 is an apocalyptic number.

It is an amenable number.

12116786605 is a deficient number, since it is larger than the sum of its proper divisors (6432791123).

12116786605 is a wasteful number, since it uses less digits than its factorization.

12116786605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731977.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 12116786605 in words is "twelve billion, one hundred sixteen million, seven hundred eighty-six thousand, six hundred five".