216690266880346 has 32 divisors (see below), whose sum is σ = 376109277304320. Its totient is φ = 91713128967936.

The previous prime is 216690266880313. The next prime is 216690266880361. The reversal of 216690266880346 is 643088662096612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246804306 + ... + 247680733.

It is an arithmetic number, because the mean of its divisors is an integer number (11753414915760).

Almost surely, 2^{216690266880346} is an apocalyptic number.

216690266880346 is a deficient number, since it is larger than the sum of its proper divisors (159419010423974).

216690266880346 is a wasteful number, since it uses less digits than its factorization.

216690266880346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494485438.

The product of its (nonzero) digits is 214990848, while the sum is 67.

The spelling of 216690266880346 in words is "two hundred sixteen trillion, six hundred ninety billion, two hundred sixty-six million, eight hundred eighty thousand, three hundred forty-six".