816655622 has 24 divisors (see below), whose sum is σ = 1303826544. Its totient is φ = 383556992.

The previous prime is 816655621. The next prime is 816655667. The reversal of 816655622 is 226556618.

It is a self number, because there is not a number n which added to its sum of digits gives 816655622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816655621) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 390263 + ... + 392349.

It is an arithmetic number, because the mean of its divisors is an integer number (54326106).

Almost surely, 2^816655622 is an apocalyptic number.

816655622 is a deficient number, since it is larger than the sum of its proper divisors (487170922).

816655622 is a wasteful number, since it uses less digits than its factorization.

816655622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2800 (or 2783 counting only the distinct ones).

The product of its digits is 172800, while the sum is 41.

The square root of 816655622 is about 28577.1870904048. The cubic root of 816655622 is about 934.7159467711.

The spelling of 816655622 in words is "eight hundred sixteen million, six hundred fifty-five thousand, six hundred twenty-two".