12073647618 has 90 divisors (see below), whose sum is σ = 27646289451. Its totient is φ = 3938305536.

The previous prime is 12073647617. The next prime is 12073647631. The reversal of 12073647618 is 81674637021.

12073647618 is a `hidden beast` number, since 1 + 20 + 7 + 3 + 6 + 4 + 7 + 618 = 666.

12073647618 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 5 ways, for example, as 1853044209 + 10220603409 = 43047^2 + 101097^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=77697.

It is not an unprimeable number, because it can be changed into a prime (12073647611) 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 44 ways as a sum of consecutive naturals, for example, 124470546 + ... + 124470642.

Almost surely, 2^12073647618 is an apocalyptic number.

12073647618 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12073647618

12073647618 is an abundant number, since it is smaller than the sum of its proper divisors (15572641833).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12073647618 is an frugal number, since it uses more digits than its factorization.

12073647618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 12073647618 in words is "twelve billion, seventy-three million, six hundred forty-seven thousand, six hundred eighteen".