216406540864049 has 8 divisors (see below), whose sum is σ = 217024366003200. Its totient is φ = 215788742705536.

The previous prime is 216406540863937. The next prime is 216406540864147. The reversal of 216406540864049 is 940468045604612.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216406540864049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216406540863049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9374264 + ... + 22818630.

It is an arithmetic number, because the mean of its divisors is an integer number (27128045750400).

Almost surely, 2^{216406540864049} is an apocalyptic number.

It is an amenable number.

216406540864049 is a deficient number, since it is larger than the sum of its proper divisors (617825139151).

216406540864049 is a wasteful number, since it uses less digits than its factorization.

216406540864049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13490319.

The product of its (nonzero) digits is 39813120, while the sum is 59.

The spelling of 216406540864049 in words is "two hundred sixteen trillion, four hundred six billion, five hundred forty million, eight hundred sixty-four thousand, forty-nine".