561650556160 has 72 divisors (see below), whose sum is σ = 1345797202176. Its totient is φ = 224581969920.

The previous prime is 561650556149. The next prime is 561650556167. The reversal of 561650556160 is 61655056165.

It is a self number, because there is not a number n which added to its sum of digits gives 561650556160.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561650556167) by changing a digit.

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, 3671605 + ... + 3821515.

It is an arithmetic number, because the mean of its divisors is an integer number (18691627808).

Almost surely, 2^561650556160 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561650556160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (672898601088).

561650556160 is an abundant number, since it is smaller than the sum of its proper divisors (784146646016).

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

561650556160 is a wasteful number, since it uses less digits than its factorization.

561650556160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152859 (or 152845 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 561650556160 in words is "five hundred sixty-one billion, six hundred fifty million, five hundred fifty-six thousand, one hundred sixty".