561709550 has 12 divisors (see below), whose sum is σ = 1044779856. Its totient is φ = 224683800.

The previous prime is 561709537. The next prime is 561709601. The reversal of 561709550 is 55907165.

561709550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×561709550² = 631035237122405000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5617046 + ... + 5617145.

It is an arithmetic number, because the mean of its divisors is an integer number (87064988).

Almost surely, 2^561709550 is an apocalyptic number.

561709550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

561709550 is a deficient number, since it is larger than the sum of its proper divisors (483070306).

561709550 is a wasteful number, since it uses less digits than its factorization.

561709550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11234203 (or 11234198 counting only the distinct ones).

The product of its (nonzero) digits is 47250, while the sum is 38.

The square root of 561709550 is about 23700.4124436686. The cubic root of 561709550 is about 825.0949630509.

The spelling of 561709550 in words is "five hundred sixty-one million, seven hundred nine thousand, five hundred fifty".