561204218610 has 128 divisors (see below), whose sum is σ = 1717434892800. Its totient is φ = 127742883840.

The previous prime is 561204218557. The next prime is 561204218689. The reversal of 561204218610 is 16812402165.

It is a happy number.

561204218610 is a `hidden beast` number, since 5 + 6 + 1 + 20 + 4 + 2 + 18 + 610 = 666.

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 63 ways as a sum of consecutive naturals, for example, 160555 + ... + 1071534.

It is an arithmetic number, because the mean of its divisors is an integer number (13417460100).

Almost surely, 2^561204218610 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561204218610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (858717446400).

561204218610 is an abundant number, since it is smaller than the sum of its proper divisors (1156230674190).

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

561204218610 is a wasteful number, since it uses less digits than its factorization.

561204218610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232353 (or 1232347 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 561204218610 in words is "five hundred sixty-one billion, two hundred four million, two hundred eighteen thousand, six hundred ten".