6818214401 has 4 divisors (see below), whose sum is σ = 6819443412. Its totient is φ = 6816985392.

The previous prime is 6818214379. The next prime is 6818214407. The reversal of 6818214401 is 1044128186.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3466383376 + 3351831025 = 58876^2 + 57895^2 .

It is a cyclic number.

It is not a de Polignac number, because 6818214401 - 2¹⁸ = 6817952257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6818214407) 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, 606146 + ... + 617291.

It is an arithmetic number, because the mean of its divisors is an integer number (1704860853).

Almost surely, 2^6818214401 is an apocalyptic number.

It is an amenable number.

6818214401 is a deficient number, since it is larger than the sum of its proper divisors (1229011).

6818214401 is a wasteful number, since it uses less digits than its factorization.

6818214401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229010.

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 6818214401 is about 82572.4796830033. The cubic root of 6818214401 is about 1896.2265274134.

The spelling of 6818214401 in words is "six billion, eight hundred eighteen million, two hundred fourteen thousand, four hundred one".