12818228567 has 4 divisors (see below), whose sum is σ = 12818869056. Its totient is φ = 12817588080.

The previous prime is 12818228539. The next prime is 12818228573. The reversal of 12818228567 is 76582281821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76582281821 = 23 ⋅3329664427.

It is a cyclic number.

It is not a de Polignac number, because 12818228567 - 2¹⁸ = 12817966423 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 (12818228537) 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, 289223 + ... + 330584.

It is an arithmetic number, because the mean of its divisors is an integer number (3204717264).

Almost surely, 2^12818228567 is an apocalyptic number.

12818228567 is a deficient number, since it is larger than the sum of its proper divisors (640489).

12818228567 is an equidigital number, since it uses as much as digits as its factorization.

12818228567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640488.

The product of its digits is 860160, while the sum is 50.

The spelling of 12818228567 in words is "twelve billion, eight hundred eighteen million, two hundred twenty-eight thousand, five hundred sixty-seven".