6781618085 has 16 divisors (see below), whose sum is σ = 8883663552. Its totient is φ = 4928803200.

The previous prime is 6781618049. The next prime is 6781618141. The reversal of 6781618085 is 5808161876.

It is a de Polignac number, because none of the positive numbers 2^k-6781618085 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 43937 + ... + 124473.

It is an arithmetic number, because the mean of its divisors is an integer number (555228972).

Almost surely, 2^6781618085 is an apocalyptic number.

It is an amenable number.

6781618085 is a deficient number, since it is larger than the sum of its proper divisors (2102045467).

6781618085 is a wasteful number, since it uses less digits than its factorization.

6781618085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82084.

The product of its (nonzero) digits is 645120, while the sum is 50.

The square root of 6781618085 is about 82350.5803561821. The cubic root of 6781618085 is about 1892.8278157568.

The spelling of 6781618085 in words is "six billion, seven hundred eighty-one million, six hundred eighteen thousand, eighty-five".