12618612667 has 4 divisors (see below), whose sum is σ = 12618885640. Its totient is φ = 12618339696.

The previous prime is 12618612631. The next prime is 12618612673. The reversal of 12618612667 is 76621681621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76621681621 = 73 ⋅1049612077.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12618612667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12618619667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48042 + ... + 165967.

It is an arithmetic number, because the mean of its divisors is an integer number (3154721410).

Almost surely, 2^12618612667 is an apocalyptic number.

12618612667 is a deficient number, since it is larger than the sum of its proper divisors (272973).

12618612667 is an equidigital number, since it uses as much as digits as its factorization.

12618612667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272972.

The product of its digits is 290304, while the sum is 46.

The spelling of 12618612667 in words is "twelve billion, six hundred eighteen million, six hundred twelve thousand, six hundred sixty-seven".