561161016 has 96 divisors (see below), whose sum is σ = 1657656000. Its totient is φ = 170456832.

The previous prime is 561160993. The next prime is 561161017. The reversal of 561161016 is 610161165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561161017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70150 + ... + 77738.

It is an arithmetic number, because the mean of its divisors is an integer number (17267250).

Almost surely, 2^561161016 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 561161016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (828828000).

561161016 is an abundant number, since it is smaller than the sum of its proper divisors (1096494984).

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

561161016 is a wasteful number, since it uses less digits than its factorization.

561161016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7693 (or 7686 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 561161016 is about 23688.8373712177. The cubic root of 561161016 is about 824.8262951092.

The spelling of 561161016 in words is "five hundred sixty-one million, one hundred sixty-one thousand, sixteen".