861822665411 has 4 divisors (see below), whose sum is σ = 861982060992. Its totient is φ = 861663269832.

The previous prime is 861822665383. The next prime is 861822665447. The reversal of 861822665411 is 114566228168.

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 861822665411 - 2¹⁰ = 861822664387 is a prime.

It is a super-2 number, since 2×861822665411² (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 861822665411.

It is not an unprimeable number, because it can be changed into a prime (861822665461) 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, 79689680 + ... + 79700493.

It is an arithmetic number, because the mean of its divisors is an integer number (215495515248).

Almost surely, 2^861822665411 is an apocalyptic number.

861822665411 is a deficient number, since it is larger than the sum of its proper divisors (159395581).

861822665411 is a wasteful number, since it uses less digits than its factorization.

861822665411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159395580.

The product of its digits is 1105920, while the sum is 50.

The spelling of 861822665411 in words is "eight hundred sixty-one billion, eight hundred twenty-two million, six hundred sixty-five thousand, four hundred eleven".