561718976 has 112 divisors (see below), whose sum is σ = 1404420864. Its totient is φ = 216953856.

The previous prime is 561718957. The next prime is 561718979. The reversal of 561718976 is 679817165.

It is a tau number, because it is divible by the number of its divisors (112).

It is not an unprimeable number, because it can be changed into a prime (561718979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249311 + ... + 251553.

It is an arithmetic number, because the mean of its divisors is an integer number (12539472).

Almost surely, 2^561718976 is an apocalyptic number.

561718976 is a gapful number since it is divisible by the number (56) 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 561718976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (702210432).

561718976 is an abundant number, since it is smaller than the sum of its proper divisors (842701888).

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

561718976 is a wasteful number, since it uses less digits than its factorization.

561718976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318 (or 2308 counting only the distinct ones).

The product of its digits is 635040, while the sum is 50.

The square root of 561718976 is about 23700.6113001332. The cubic root of 561718976 is about 825.0995783078.

The spelling of 561718976 in words is "five hundred sixty-one million, seven hundred eighteen thousand, nine hundred seventy-six".