812716016605 has 8 divisors (see below), whose sum is σ = 975783282264. Its totient is φ = 649823438400.

The previous prime is 812716016599. The next prime is 812716016611. The reversal of 812716016605 is 506610617218.

It is an interprime number because it is at equal distance from previous prime (812716016599) and next prime (812716016611).

It can be written as a sum of positive squares in 4 ways, for example, as 2505402916 + 810210613689 = 50054^2 + 900117^2 .

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

It is not a de Polignac number, because 812716016605 - 2⁹ = 812716016093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43661626 + ... + 43680235.

It is an arithmetic number, because the mean of its divisors is an integer number (121972910283).

Almost surely, 2^812716016605 is an apocalyptic number.

It is an amenable number.

812716016605 is a deficient number, since it is larger than the sum of its proper divisors (163067265659).

812716016605 is a wasteful number, since it uses less digits than its factorization.

812716016605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87343727.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 812716016605 in words is "eight hundred twelve billion, seven hundred sixteen million, sixteen thousand, six hundred five".