818556216 has 16 divisors (see below), whose sum is σ = 2046390600. Its totient is φ = 272852064.

The previous prime is 818556187. The next prime is 818556253. The reversal of 818556216 is 612655818.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17053231 + ... + 17053278.

Almost surely, 2^818556216 is an apocalyptic number.

It is an amenable number.

818556216 is an abundant number, since it is smaller than the sum of its proper divisors (1227834384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

818556216 is a wasteful number, since it uses less digits than its factorization.

818556216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34106518 (or 34106514 counting only the distinct ones).

The product of its digits is 115200, while the sum is 42.

The square root of 818556216 is about 28610.4214579233. The cubic root of 818556216 is about 935.4405031595.

The spelling of 818556216 in words is "eight hundred eighteen million, five hundred fifty-six thousand, two hundred sixteen".