8218143645 has 8 divisors (see below), whose sum is σ = 13149029856. Its totient is φ = 4383009936.

The previous prime is 8218143641. The next prime is 8218143649. The reversal of 8218143645 is 5463418128.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8218143641) and next prime (8218143649).

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

It is not a de Polignac number, because 8218143645 - 2² = 8218143641 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8218143597 and 8218143606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8218143641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273938107 + ... + 273938136.

It is an arithmetic number, because the mean of its divisors is an integer number (1643628732).

Almost surely, 2^8218143645 is an apocalyptic number.

It is an amenable number.

8218143645 is a deficient number, since it is larger than the sum of its proper divisors (4930886211).

8218143645 is a wasteful number, since it uses less digits than its factorization.

8218143645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547876251.

The product of its digits is 184320, while the sum is 42.

The square root of 8218143645 is about 90653.9775464927. The cubic root of 8218143645 is about 2018.0158641173.

The spelling of 8218143645 in words is "eight billion, two hundred eighteen million, one hundred forty-three thousand, six hundred forty-five".