561110550 has 384 divisors, whose sum is σ = 1937875968. Its totient is φ = 103680000.

The previous prime is 561110521. The next prime is 561110567. The reversal of 561110550 is 55011165.

561110550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 561110550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 5555500 + ... + 5555600.

It is an arithmetic number, because the mean of its divisors is an integer number (5046552).

Almost surely, 2^561110550 is an apocalyptic number.

561110550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 561110550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (968937984).

561110550 is an abundant number, since it is smaller than the sum of its proper divisors (1376765418).

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

561110550 is a wasteful number, since it uses less digits than its factorization.

561110550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 561110550 is about 23687.7721620249. The cubic root of 561110550 is about 824.8015684381.

It can be divided in two parts, 5611 and 10550, that added together give a palindrome (16161).

The spelling of 561110550 in words is "five hundred sixty-one million, one hundred ten thousand, five hundred fifty".