6818538977 has 8 divisors (see below), whose sum is σ = 6836895912. Its totient is φ = 6800198400.

The previous prime is 6818538971. The next prime is 6818538983. The reversal of 6818538977 is 7798358186.

It is an interprime number because it is at equal distance from previous prime (6818538971) and next prime (6818538983).

It can be written as a sum of positive squares in 4 ways, for example, as 1642599841 + 5175939136 = 40529^2 + 71944^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 6818538977 - 2¹⁴ = 6818522593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6818538971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1630313 + ... + 1634489.

It is an arithmetic number, because the mean of its divisors is an integer number (854611989).

Almost surely, 2^6818538977 is an apocalyptic number.

It is an amenable number.

6818538977 is a deficient number, since it is larger than the sum of its proper divisors (18356935).

6818538977 is a wasteful number, since it uses less digits than its factorization.

6818538977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8179.

The product of its digits is 20321280, while the sum is 62.

The square root of 6818538977 is about 82574.4450602001. The cubic root of 6818538977 is about 1896.2566164181.

The spelling of 6818538977 in words is "six billion, eight hundred eighteen million, five hundred thirty-eight thousand, nine hundred seventy-seven".