6511216018 has 8 divisors (see below), whose sum is σ = 9767480112. Its totient is φ = 3255389316.

The previous prime is 6511216013. The next prime is 6511216079. The reversal of 6511216018 is 8106121156.

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

It is not an unprimeable number, because it can be changed into a prime (6511216013) 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, 69180 + ... + 133447.

It is an arithmetic number, because the mean of its divisors is an integer number (1220935014).

Almost surely, 2^6511216018 is an apocalyptic number.

6511216018 is a deficient number, since it is larger than the sum of its proper divisors (3256264094).

6511216018 is a wasteful number, since it uses less digits than its factorization.

6511216018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218696.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 6511216018 is about 80692.1062929950. The cubic root of 6511216018 is about 1867.3283952310.

The spelling of 6511216018 in words is "six billion, five hundred eleven million, two hundred sixteen thousand, eighteen".