816177968 has 20 divisors (see below), whose sum is σ = 1624085040. Its totient is φ = 397059264.

The previous prime is 816177961. The next prime is 816177997. The reversal of 816177968 is 869771618.

It is a super-2 number, since 2×816177968² = 1332292950897218048, which contains 22 as substring.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (816177961) 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 3 ways as a sum of consecutive naturals, for example, 688748 + ... + 689931.

It is an arithmetic number, because the mean of its divisors is an integer number (81204252).

Almost surely, 2^816177968 is an apocalyptic number.

It is an amenable number.

816177968 is a deficient number, since it is larger than the sum of its proper divisors (807907072).

816177968 is a wasteful number, since it uses less digits than its factorization.

816177968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378724 (or 1378718 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 53.

The square root of 816177968 is about 28568.8286074176. The cubic root of 816177968 is about 934.5336757818.

The spelling of 816177968 in words is "eight hundred sixteen million, one hundred seventy-seven thousand, nine hundred sixty-eight".