816168996 has 36 divisors (see below), whose sum is σ = 2070461484. Its totient is φ = 271084800.

The previous prime is 816168979. The next prime is 816169019. The reversal of 816168996 is 699861618.

It can be written as a sum of positive squares in 2 ways, for example, as 735168996 + 81000000 = 27114^2 + 9000^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×816168996² = 1332263660063296032, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30225 + ... + 50456.

It is an arithmetic number, because the mean of its divisors is an integer number (57512819).

Almost surely, 2^816168996 is an apocalyptic number.

It is an amenable number.

816168996 is an abundant number, since it is smaller than the sum of its proper divisors (1254292488).

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

816168996 is a wasteful number, since it uses less digits than its factorization.

816168996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80972 (or 80967 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 816168996 is about 28568.6715826970. The cubic root of 816168996 is about 934.5302514196.

The spelling of 816168996 in words is "eight hundred sixteen million, one hundred sixty-eight thousand, nine hundred ninety-six".