561500650 has 24 divisors (see below), whose sum is σ = 1105827660. Its totient is φ = 211388160.

The previous prime is 561500627. The next prime is 561500659. The reversal of 561500650 is 56005165.

It can be written as a sum of positive squares in 6 ways, for example, as 446603689 + 114896961 = 21133^2 + 10719^2 .

It is not an unprimeable number, because it can be changed into a prime (561500659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 329445 + ... + 331144.

Almost surely, 2^561500650 is an apocalyptic number.

561500650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

561500650 is a deficient number, since it is larger than the sum of its proper divisors (544327010).

561500650 is a wasteful number, since it uses less digits than its factorization.

561500650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660618 (or 660613 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 561500650 is about 23696.0049375417. The cubic root of 561500650 is about 824.9926659893.

The spelling of 561500650 in words is "five hundred sixty-one million, five hundred thousand, six hundred fifty".