561222121222164 has 48 divisors (see below), whose sum is σ = 1366459434966528. Its totient is φ = 178939656469728.

The previous prime is 561222121222163. The next prime is 561222121222219. The reversal of 561222121222164 is 461222121222165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561222121222163) 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, 65758899 + ... + 73801605.

It is an arithmetic number, because the mean of its divisors is an integer number (28467904895136).

Almost surely, 2^{561222121222164} is an apocalyptic number.

It is an amenable number.

561222121222164 is an abundant number, since it is smaller than the sum of its proper divisors (805237313744364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561222121222164 is a wasteful number, since it uses less digits than its factorization.

561222121222164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8295564 (or 8295562 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

Subtracting from 561222121222164 its reverse (461222121222165), we obtain a palindrome (99999999999999).

The spelling of 561222121222164 in words is "five hundred sixty-one trillion, two hundred twenty-two billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred sixty-four".