12108678369 has 4 divisors (see below), whose sum is σ = 16144904496. Its totient is φ = 8072452244.

The previous prime is 12108678347. The next prime is 12108678391. The reversal of 12108678369 is 96387680121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 96387680121 = 3 ⋅32129226707.

It is an interprime number because it is at equal distance from previous prime (12108678347) and next prime (12108678391).

It is a cyclic number.

It is not a de Polignac number, because 12108678369 - 2⁹ = 12108677857 is a prime.

It is a super-2 number, since 2×12108678369² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12108671369) 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, 2018113059 + ... + 2018113064.

It is an arithmetic number, because the mean of its divisors is an integer number (4036226124).

Almost surely, 2^12108678369 is an apocalyptic number.

It is an amenable number.

12108678369 is a deficient number, since it is larger than the sum of its proper divisors (4036226127).

12108678369 is an equidigital number, since it uses as much as digits as its factorization.

12108678369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4036226126.

The product of its (nonzero) digits is 870912, while the sum is 51.

The spelling of 12108678369 in words is "twelve billion, one hundred eight million, six hundred seventy-eight thousand, three hundred sixty-nine".