561620684 has 12 divisors (see below), whose sum is σ = 992379024. Its totient is φ = 278083824.

The previous prime is 561620681. The next prime is 561620723. The reversal of 561620684 is 486026165.

561620684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (561620681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 681167 + ... + 681990.

It is an arithmetic number, because the mean of its divisors is an integer number (82698252).

Almost surely, 2^561620684 is an apocalyptic number.

It is an amenable number.

561620684 is a deficient number, since it is larger than the sum of its proper divisors (430758340).

561620684 is a wasteful number, since it uses less digits than its factorization.

561620684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363264 (or 1363262 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 561620684 is about 23698.5375920119. The cubic root of 561620684 is about 825.0514490106.

The spelling of 561620684 in words is "five hundred sixty-one million, six hundred twenty thousand, six hundred eighty-four".