561575678 has 8 divisors (see below), whose sum is σ = 843771600. Its totient is φ = 280318480.

The previous prime is 561575653. The next prime is 561575681. The reversal of 561575678 is 876575165.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233183 + ... + 235578.

It is an arithmetic number, because the mean of its divisors is an integer number (105471450).

Almost surely, 2^561575678 is an apocalyptic number.

561575678 is a deficient number, since it is larger than the sum of its proper divisors (282195922).

561575678 is a wasteful number, since it uses less digits than its factorization.

561575678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469362.

The product of its digits is 1764000, while the sum is 50.

The square root of 561575678 is about 23697.5880207248. The cubic root of 561575678 is about 825.0294096648.

The spelling of 561575678 in words is "five hundred sixty-one million, five hundred seventy-five thousand, six hundred seventy-eight".