812116569 has 16 divisors (see below), whose sum is σ = 1188792000. Its totient is φ = 489053760.

The previous prime is 812116567. The next prime is 812116573. The reversal of 812116569 is 965611218.

It is not a de Polignac number, because 812116569 - 2¹ = 812116567 is a prime.

It is a super-4 number, since 4×812116569⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (812116567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73194 + ... + 83555.

It is an arithmetic number, because the mean of its divisors is an integer number (74299500).

Almost surely, 2^812116569 is an apocalyptic number.

It is an amenable number.

812116569 is a deficient number, since it is larger than the sum of its proper divisors (376675431).

812116569 is a wasteful number, since it uses less digits than its factorization.

812116569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156920.

The product of its digits is 25920, while the sum is 39.

The square root of 812116569 is about 28497.6590091186. The cubic root of 812116569 is about 932.9809804173.

The spelling of 812116569 in words is "eight hundred twelve million, one hundred sixteen thousand, five hundred sixty-nine".