561782682 has 64 divisors (see below), whose sum is σ = 1344798720. Its totient is φ = 173329200.

The previous prime is 561782653. The next prime is 561782687. The reversal of 561782682 is 286287165.

561782682 is a `hidden beast` number, since 5 + 617 + 8 + 26 + 8 + 2 = 666.

It is a super-2 number, since 2×561782682² = 631199563590226248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (561782687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31207 + ... + 45797.

It is an arithmetic number, because the mean of its divisors is an integer number (21012480).

Almost surely, 2^561782682 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561782682, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (672399360).

561782682 is an abundant number, since it is smaller than the sum of its proper divisors (783016038).

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

561782682 is a wasteful number, since it uses less digits than its factorization.

561782682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14656 (or 14650 counting only the distinct ones).

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

The square root of 561782682 is about 23701.9552358028. The cubic root of 561782682 is about 825.1307693535.

The spelling of 561782682 in words is "five hundred sixty-one million, seven hundred eighty-two thousand, six hundred eighty-two".