561286578 has 8 divisors (see below), whose sum is σ = 1122573168. Its totient is φ = 187095524.

The previous prime is 561286577. The next prime is 561286601. The reversal of 561286578 is 875682165.

It is a sphenic number, since it is the product of 3 distinct primes.

561286578 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (561286571) 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, 46773876 + ... + 46773887.

It is an arithmetic number, because the mean of its divisors is an integer number (140321646).

Almost surely, 2^561286578 is an apocalyptic number.

561286578 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

561286578 is a wasteful number, since it uses less digits than its factorization.

561286578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93547768.

The product of its digits is 806400, while the sum is 48.

The square root of 561286578 is about 23691.4874585789. The cubic root of 561286578 is about 824.8878099049.

The spelling of 561286578 in words is "five hundred sixty-one million, two hundred eighty-six thousand, five hundred seventy-eight".