561986356 has 12 divisors (see below), whose sum is σ = 983795680. Its totient is φ = 280901880.

The previous prime is 561986353. The next prime is 561986407. The reversal of 561986356 is 653689165.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561986353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7890 + ... + 34441.

Almost surely, 2^561986356 is an apocalyptic number.

It is an amenable number.

561986356 is a deficient number, since it is larger than the sum of its proper divisors (421809324).

561986356 is a wasteful number, since it uses less digits than its factorization.

561986356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45654 (or 45652 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 49.

The square root of 561986356 is about 23706.2514118112. The cubic root of 561986356 is about 825.2304742062.

The spelling of 561986356 in words is "five hundred sixty-one million, nine hundred eighty-six thousand, three hundred fifty-six".