561086784 has 112 divisors (see below), whose sum is σ = 1676847040. Its totient is φ = 183928320.

The previous prime is 561086753. The next prime is 561086791. The reversal of 561086784 is 487680165.

It is a happy number.

561086784 is a `hidden beast` number, since 561 + 0 + 8 + 6 + 7 + 84 = 666.

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, 102747 + ... + 108069.

Almost surely, 2^561086784 is an apocalyptic number.

561086784 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561086784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (838423520).

561086784 is an abundant number, since it is smaller than the sum of its proper divisors (1115760256).

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

561086784 is a wasteful number, since it uses less digits than its factorization.

561086784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5405 (or 5389 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 561086784 is about 23687.2705054846. The cubic root of 561086784 is about 824.7899233705.

The spelling of 561086784 in words is "five hundred sixty-one million, eighty-six thousand, seven hundred eighty-four".