561840280722 has 270 divisors, whose sum is σ = 1504707392727. Its totient is φ = 156232640592.

The previous prime is 561840280699. The next prime is 561840280723. The reversal of 561840280722 is 227082048165.

561840280722 is a `hidden beast` number, since 5 + 618 + 4 + 0 + 2 + 8 + 0 + 7 + 22 = 666.

It can be written as a sum of positive squares in only one way, i.e., 280920140361 + 280920140361 = 530019^2 + 530019^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=530019.

It is not an unprimeable number, because it can be changed into a prime (561840280723) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 3138772429 + ... + 3138772607.

Almost surely, 2^561840280722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561840280722

561840280722 is an abundant number, since it is smaller than the sum of its proper divisors (942867112005).

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

561840280722 is an equidigital number, since it uses as much as digits as its factorization.

561840280722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The spelling of 561840280722 in words is "five hundred sixty-one billion, eight hundred forty million, two hundred eighty thousand, seven hundred twenty-two".