6865736018 has 4 divisors (see below), whose sum is σ = 10298604030. Its totient is φ = 3432868008.

The previous prime is 6865736011. The next prime is 6865736039. The reversal of 6865736018 is 8106375686.

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 only one way, i.e., 6297533449 + 568202569 = 79357^2 + 23837^2 .

It is not an unprimeable number, because it can be changed into a prime (6865736011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1716434003 + ... + 1716434006.

Almost surely, 2^6865736018 is an apocalyptic number.

6865736018 is a deficient number, since it is larger than the sum of its proper divisors (3432868012).

6865736018 is a wasteful number, since it uses less digits than its factorization.

6865736018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3432868011.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 6865736018 is about 82859.7370138235. The cubic root of 6865736018 is about 1900.6217741572.

The spelling of 6865736018 in words is "six billion, eight hundred sixty-five million, seven hundred thirty-six thousand, eighteen".