216626164 has 12 divisors (see below), whose sum is σ = 382574500. Its totient is φ = 107319168.

The previous prime is 216626161. The next prime is 216626177. The reversal of 216626164 is 461626612.

It can be written as a sum of positive squares in 2 ways, for example, as 144240100 + 72386064 = 12010^2 + 8508^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216626161) 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, 247989 + ... + 248860.

Almost surely, 2^216626164 is an apocalyptic number.

It is an amenable number.

216626164 is a deficient number, since it is larger than the sum of its proper divisors (165948336).

216626164 is a wasteful number, since it uses less digits than its factorization.

216626164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496962 (or 496960 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 216626164 is about 14718.2255723983. The cubic root of 216626164 is about 600.5792221377.

The spelling of 216626164 in words is "two hundred sixteen million, six hundred twenty-six thousand, one hundred sixty-four".