12345556679 has 8 divisors (see below), whose sum is σ = 13443438000. Its totient is φ = 11292486912.

The previous prime is 12345556661. The next prime is 12345556681. The reversal of 12345556679 is 97665554321.

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

It is a cyclic number.

It is not a de Polignac number, because 12345556679 - 2⁸ = 12345556423 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 12345556679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12345556079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11202314 + ... + 11203415.

It is an arithmetic number, because the mean of its divisors is an integer number (1680429750).

Almost surely, 2^12345556679 is an apocalyptic number.

12345556679 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12345556679 is a deficient number, since it is larger than the sum of its proper divisors (1097881321).

12345556679 is a wasteful number, since it uses less digits than its factorization.

12345556679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22405777.

The product of its digits is 6804000, while the sum is 53.

The spelling of 12345556679 in words is "twelve billion, three hundred forty-five million, five hundred fifty-six thousand, six hundred seventy-nine".