12261786685 has 8 divisors (see below), whose sum is σ = 14714748216. Its totient is φ = 9809026560.

The previous prime is 12261786683. The next prime is 12261786773. The reversal of 12261786685 is 58668716221.

It is a happy number.

12261786685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5968249 + 12255818436 = 2443^2 + 110706^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12261786685 - 2¹ = 12261786683 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 (12261786683) 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 7 ways as a sum of consecutive naturals, for example, 176565 + ... + 236005.

It is an arithmetic number, because the mean of its divisors is an integer number (1839343527).

Almost surely, 2^12261786685 is an apocalyptic number.

It is an amenable number.

12261786685 is a deficient number, since it is larger than the sum of its proper divisors (2452961531).

12261786685 is an equidigital number, since it uses as much as digits as its factorization.

12261786685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100703.

The product of its digits is 1935360, while the sum is 52.

The spelling of 12261786685 in words is "twelve billion, two hundred sixty-one million, seven hundred eighty-six thousand, six hundred eighty-five".