561005446 has 4 divisors (see below), whose sum is σ = 841508172. Its totient is φ = 280502722.

The previous prime is 561005441. The next prime is 561005447. The reversal of 561005446 is 644500165.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×561005446² = 629454220883317832, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561005441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140251360 + ... + 140251363.

It is an arithmetic number, because the mean of its divisors is an integer number (210377043).

Almost surely, 2^561005446 is an apocalyptic number.

561005446 is a deficient number, since it is larger than the sum of its proper divisors (280502726).

561005446 is a wasteful number, since it uses less digits than its factorization.

561005446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280502725.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 561005446 is about 23685.5535295251. The cubic root of 561005446 is about 824.7500661941.

The spelling of 561005446 in words is "five hundred sixty-one million, five thousand, four hundred forty-six".