561613200220 has 24 divisors (see below), whose sum is σ = 1179439809408. Its totient is φ = 224635358400.

The previous prime is 561613200199. The next prime is 561613200233. The reversal of 561613200220 is 22002316165.

It is a super-2 number, since 2×561613200220² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147151 + ... + 1069990.

It is an arithmetic number, because the mean of its divisors is an integer number (49143325392).

Almost surely, 2^561613200220 is an apocalyptic number.

It is an amenable number.

561613200220 is an abundant number, since it is smaller than the sum of its proper divisors (617826609188).

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

561613200220 is a wasteful number, since it uses less digits than its factorization.

561613200220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240221 (or 1240219 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 561613200220 its reverse (22002316165), we get a palindrome (583615516385).

The spelling of 561613200220 in words is "five hundred sixty-one billion, six hundred thirteen million, two hundred thousand, two hundred twenty".