561618712 has 8 divisors (see below), whose sum is σ = 1053035100. Its totient is φ = 280809352.

The previous prime is 561618689. The next prime is 561618737. The reversal of 561618712 is 217816165.

561618712 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35101162 + ... + 35101177.

Almost surely, 2^561618712 is an apocalyptic number.

It is an amenable number.

561618712 is a deficient number, since it is larger than the sum of its proper divisors (491416388).

561618712 is a wasteful number, since it uses less digits than its factorization.

561618712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70202345 (or 70202341 counting only the distinct ones).

The product of its digits is 20160, while the sum is 37.

The square root of 561618712 is about 23698.4959860325. The cubic root of 561618712 is about 825.0504833509.

It can be divided in two parts, 561618 and 712, that added together give a triangular number (562330 = T₁₀₆₀).

The spelling of 561618712 in words is "five hundred sixty-one million, six hundred eighteen thousand, seven hundred twelve".