816612811 has 8 divisors (see below), whose sum is σ = 933780960. Its totient is φ = 699571968.

The previous prime is 816612793. The next prime is 816612851. The reversal of 816612811 is 118216618.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 816612811 - 2¹¹ = 816610763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (816612851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17656 + ... + 44101.

It is an arithmetic number, because the mean of its divisors is an integer number (116722620).

Almost surely, 2^816612811 is an apocalyptic number.

816612811 is a deficient number, since it is larger than the sum of its proper divisors (117168149).

816612811 is a wasteful number, since it uses less digits than its factorization.

816612811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63653.

The product of its digits is 4608, while the sum is 34.

The square root of 816612811 is about 28576.4380390559. The cubic root of 816612811 is about 934.6996131528.

The spelling of 816612811 in words is "eight hundred sixteen million, six hundred twelve thousand, eight hundred eleven".