12199618657 has 4 divisors (see below), whose sum is σ = 12203202816. Its totient is φ = 12196034500.

The previous prime is 12199618633. The next prime is 12199618747. The reversal of 12199618657 is 75681699121.

It is a happy number.

12199618657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12199618657 - 2¹¹ = 12199616609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12199618598 and 12199618607.

It is not an unprimeable number, because it can be changed into a prime (12199618957) 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 3 ways as a sum of consecutive naturals, for example, 1786969 + ... + 1793782.

It is an arithmetic number, because the mean of its divisors is an integer number (3050800704).

Almost surely, 2^12199618657 is an apocalyptic number.

It is an amenable number.

12199618657 is a deficient number, since it is larger than the sum of its proper divisors (3584159).

12199618657 is an equidigital number, since it uses as much as digits as its factorization.

12199618657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3584158.

The product of its digits is 1632960, while the sum is 55.

The spelling of 12199618657 in words is "twelve billion, one hundred ninety-nine million, six hundred eighteen thousand, six hundred fifty-seven".