561605076 has 72 divisors (see below), whose sum is σ = 1536260544. Its totient is φ = 179055360.

The previous prime is 561605027. The next prime is 561605087. The reversal of 561605076 is 670506165.

It is a happy number.

561605076 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×561605076² = 630800522777931552, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 561605076.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9796 + ... + 34916.

It is an arithmetic number, because the mean of its divisors is an integer number (21336952).

Almost surely, 2^561605076 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 561605076, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (768130272).

561605076 is an abundant number, since it is smaller than the sum of its proper divisors (974655468).

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

561605076 is a wasteful number, since it uses less digits than its factorization.

561605076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25163 (or 25149 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 561605076 is about 23698.2082867039. The cubic root of 561605076 is about 825.0438059384.

The spelling of 561605076 in words is "five hundred sixty-one million, six hundred five thousand, seventy-six".