12115385787 has 8 divisors (see below), whose sum is σ = 16189197136. Its totient is φ = 8059249152.

The previous prime is 12115385761. The next prime is 12115385809. The reversal of 12115385787 is 78758351121.

12115385787 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12115385787 - 2¹⁰ = 12115384763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12115385747) 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, 4417078 + ... + 4419819.

It is an arithmetic number, because the mean of its divisors is an integer number (2023649642).

Almost surely, 2^12115385787 is an apocalyptic number.

12115385787 is a deficient number, since it is larger than the sum of its proper divisors (4073811349).

12115385787 is an equidigital number, since it uses as much as digits as its factorization.

12115385787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8837357.

The product of its digits is 470400, while the sum is 48.

The spelling of 12115385787 in words is "twelve billion, one hundred fifteen million, three hundred eighty-five thousand, seven hundred eighty-seven".