12198479999 has 4 divisors (see below), whose sum is σ = 12916037664. Its totient is φ = 11480922336.

The previous prime is 12198479861. The next prime is 12198480083. The reversal of 12198479999 is 99997489121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12198479999 - 2⁸ = 12198479743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12198476999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 358778807 + ... + 358778840.

It is an arithmetic number, because the mean of its divisors is an integer number (3229009416).

Almost surely, 2^12198479999 is an apocalyptic number.

12198479999 is a deficient number, since it is larger than the sum of its proper divisors (717557665).

12198479999 is an equidigital number, since it uses as much as digits as its factorization.

12198479999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717557664.

The product of its digits is 26453952, while the sum is 68.

The spelling of 12198479999 in words is "twelve billion, one hundred ninety-eight million, four hundred seventy-nine thousand, nine hundred ninety-nine".