818159892811 has 4 divisors (see below), whose sum is σ = 820263132000. Its totient is φ = 816056653624.

The previous prime is 818159892751. The next prime is 818159892821. The reversal of 818159892811 is 118298951818.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 818159892811 - 2⁹ = 818159892299 is a prime.

It is a super-2 number, since 2×818159892811² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 818159892811.

It is not an unprimeable number, because it can be changed into a prime (818159892821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1051619011 + ... + 1051619788.

It is an arithmetic number, because the mean of its divisors is an integer number (205065783000).

Almost surely, 2^818159892811 is an apocalyptic number.

818159892811 is a deficient number, since it is larger than the sum of its proper divisors (2103239189).

818159892811 is a wasteful number, since it uses less digits than its factorization.

818159892811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2103239188.

The product of its digits is 3317760, while the sum is 61.

The spelling of 818159892811 in words is "eight hundred eighteen billion, one hundred fifty-nine million, eight hundred ninety-two thousand, eight hundred eleven".