561536916 has 48 divisors (see below), whose sum is σ = 1333706304. Its totient is φ = 183845376.

The previous prime is 561536897. The next prime is 561536923. The reversal of 561536916 is 619635165.

561536916 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 347326 + ... + 348938.

It is an arithmetic number, because the mean of its divisors is an integer number (27785548).

Almost surely, 2^561536916 is an apocalyptic number.

It is an amenable number.

561536916 is an abundant number, since it is smaller than the sum of its proper divisors (772169388).

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

561536916 is a wasteful number, since it uses less digits than its factorization.

561536916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120 (or 2118 counting only the distinct ones).

The product of its digits is 145800, while the sum is 42.

The square root of 561536916 is about 23696.7701596652. The cubic root of 561536916 is about 825.0104270491.

The spelling of 561536916 in words is "five hundred sixty-one million, five hundred thirty-six thousand, nine hundred sixteen".