8640816012 has 18 divisors (see below), whose sum is σ = 21842062788. Its totient is φ = 2880271992.

The previous prime is 8640815993. The next prime is 8640816013. The reversal of 8640816012 is 2106180468.

8640816012 is a `hidden beast` number, since 8 + 6 + 40 + 8 + 1 + 601 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 240022667 = 8640816012 / (8 + 6 + 4 + 0 + 8 + 1 + 6 + 0 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (8640816013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 120011298 + ... + 120011369.

Almost surely, 2^8640816012 is an apocalyptic number.

It is an amenable number.

8640816012 is an abundant number, since it is smaller than the sum of its proper divisors (13201246776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8640816012 is a wasteful number, since it uses less digits than its factorization.

8640816012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240022677 (or 240022672 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 8640816012 is about 92955.9896510171. The cubic root of 8640816012 is about 2052.0357340197.

The spelling of 8640816012 in words is "eight billion, six hundred forty million, eight hundred sixteen thousand, twelve".