561122221165 has 64 divisors (see below), whose sum is σ = 747302879232. Its totient is φ = 401083257600.

The previous prime is 561122221159. The next prime is 561122221171.

561122221165 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (561122221159) and next prime (561122221171).

It is not a de Polignac number, because 561122221165 - 2⁵ = 561122221133 is a prime.

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 561122221165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 516211252 + ... + 516212338.

It is an arithmetic number, because the mean of its divisors is an integer number (11676607488).

Almost surely, 2^561122221165 is an apocalyptic number.

561122221165 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

561122221165 is a deficient number, since it is larger than the sum of its proper divisors (186180658067).

561122221165 is a wasteful number, since it uses less digits than its factorization.

561122221165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810.

The product of its digits is 14400, while the sum is 34.

It can be divided in two parts, 561122 and 221165, that added together give a palindrome (782287).

The spelling of 561122221165 in words is "five hundred sixty-one billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred sixty-five".