816169688 has 32 divisors (see below), whose sum is σ = 1555202160. Its totient is φ = 401500800.

The previous prime is 816169687. The next prime is 816169703. The reversal of 816169688 is 886961618.

It is a happy number.

It is a super-2 number, since 2×816169688² = 1332265919220034688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816169687) 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 7 ways as a sum of consecutive naturals, for example, 128606 + ... + 134802.

Almost surely, 2^816169688 is an apocalyptic number.

It is an amenable number.

816169688 is a deficient number, since it is larger than the sum of its proper divisors (739032472).

816169688 is a wasteful number, since it uses less digits than its factorization.

816169688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6467 (or 6463 counting only the distinct ones).

The product of its digits is 995328, while the sum is 53.

The square root of 816169688 is about 28568.6836938631. The cubic root of 816169688 is about 934.5305155376.

The spelling of 816169688 in words is "eight hundred sixteen million, one hundred sixty-nine thousand, six hundred eighty-eight".