216406540864058 has 4 divisors (see below), whose sum is σ = 324609811296090. Its totient is φ = 108203270432028.

The previous prime is 216406540863937. The next prime is 216406540864147. The reversal of 216406540864058 is 850468045604612.

216406540864058 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 196588525126009 + 19818015738049 = 14021003^2 + 4451743^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 216406540863988 and 216406540864006.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54101635216013 + ... + 54101635216016.

Almost surely, 2^{216406540864058} is an apocalyptic number.

216406540864058 is a deficient number, since it is larger than the sum of its proper divisors (108203270432032).

216406540864058 is a wasteful number, since it uses less digits than its factorization.

216406540864058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108203270432031.

The product of its (nonzero) digits is 44236800, while the sum is 59.

The spelling of 216406540864058 in words is "two hundred sixteen trillion, four hundred six billion, five hundred forty million, eight hundred sixty-four thousand, fifty-eight".