12135541785 has 8 divisors (see below), whose sum is σ = 19416866880. Its totient is φ = 6472288944.

The previous prime is 12135541741. The next prime is 12135541823. The reversal of 12135541785 is 58714553121.

12135541785 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 12135541785 - 2¹⁵ = 12135509017 is a prime.

It is an unprimeable number.

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, 404518045 + ... + 404518074.

It is an arithmetic number, because the mean of its divisors is an integer number (2427108360).

Almost surely, 2^12135541785 is an apocalyptic number.

12135541785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12135541785 is a deficient number, since it is larger than the sum of its proper divisors (7281325095).

12135541785 is an equidigital number, since it uses as much as digits as its factorization.

12135541785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809036127.

The product of its digits is 168000, while the sum is 42.

The spelling of 12135541785 in words is "twelve billion, one hundred thirty-five million, five hundred forty-one thousand, seven hundred eighty-five".