65943818816 has 28 divisors (see below), whose sum is σ = 131444097792. Its totient is φ = 32824046208.

The previous prime is 65943818813. The next prime is 65943818819. The reversal of 65943818816 is 61881834956.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (65943818813) and next prime (65943818819).

It is not an unprimeable number, because it can be changed into a prime (65943818813) 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 3 ways as a sum of consecutive naturals, for example, 2295980 + ... + 2324523.

It is an arithmetic number, because the mean of its divisors is an integer number (4694432064).

Almost surely, 2^65943818816 is an apocalyptic number.

It is an amenable number.

65943818816 is a deficient number, since it is larger than the sum of its proper divisors (65500278976).

65943818816 is a wasteful number, since it uses less digits than its factorization.

65943818816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4620738 (or 4620728 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 59.

The spelling of 65943818816 in words is "sixty-five billion, nine hundred forty-three million, eight hundred eighteen thousand, eight hundred sixteen".