561649112 has 16 divisors (see below), whose sum is σ = 1063317840. Its totient is φ = 278097696.

The previous prime is 561649097. The next prime is 561649163. The reversal of 561649112 is 211946165.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339983 + ... + 341630.

It is an arithmetic number, because the mean of its divisors is an integer number (66457365).

Almost surely, 2^561649112 is an apocalyptic number.

It is an amenable number.

561649112 is a deficient number, since it is larger than the sum of its proper divisors (501668728).

561649112 is a wasteful number, since it uses less digits than its factorization.

561649112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681722 (or 681718 counting only the distinct ones).

The product of its digits is 12960, while the sum is 35.

The square root of 561649112 is about 23699.1373682672. The cubic root of 561649112 is about 825.0653695371.

The spelling of 561649112 in words is "five hundred sixty-one million, six hundred forty-nine thousand, one hundred twelve".