216644146 has 16 divisors (see below), whose sum is σ = 330853248. Its totient is φ = 106372000.

The previous prime is 216644119. The next prime is 216644147. The reversal of 216644146 is 641446612.

It is not an unprimeable number, because it can be changed into a prime (216644147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34446 + ... + 40246.

It is an arithmetic number, because the mean of its divisors is an integer number (20678328).

Almost surely, 2^216644146 is an apocalyptic number.

216644146 is a deficient number, since it is larger than the sum of its proper divisors (114209102).

216644146 is a wasteful number, since it uses less digits than its factorization.

216644146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6137.

The product of its digits is 27648, while the sum is 34.

The square root of 216644146 is about 14718.8364349904. The cubic root of 216644146 is about 600.5958395776.

The spelling of 216644146 in words is "two hundred sixteen million, six hundred forty-four thousand, one hundred forty-six".