6818654893 has 4 divisors (see below), whose sum is σ = 6819667228. Its totient is φ = 6817642560.

The previous prime is 6818654851. The next prime is 6818654897. The reversal of 6818654893 is 3984568186.

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 3704791689 + 3113863204 = 60867^2 + 55802^2 .

It is a cyclic number.

It is not a de Polignac number, because 6818654893 - 2¹⁷ = 6818523821 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 (6818654897) 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, 495996 + ... + 509557.

It is an arithmetic number, because the mean of its divisors is an integer number (1704916807).

Almost surely, 2^6818654893 is an apocalyptic number.

It is an amenable number.

6818654893 is a deficient number, since it is larger than the sum of its proper divisors (1012335).

6818654893 is a wasteful number, since it uses less digits than its factorization.

6818654893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012334.

The product of its digits is 9953280, while the sum is 58.

The square root of 6818654893 is about 82575.1469450706. The cubic root of 6818654893 is about 1896.2673618890.

The spelling of 6818654893 in words is "six billion, eight hundred eighteen million, six hundred fifty-four thousand, eight hundred ninety-three".