561101110550 has 12 divisors (see below), whose sum is σ = 1043648065716. Its totient is φ = 224440444200.

The previous prime is 561101110541. The next prime is 561101110567. The reversal of 561101110550 is 55011101165.

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 5 ways as a sum of consecutive naturals, for example, 5611011056 + ... + 5611011155.

It is an arithmetic number, because the mean of its divisors is an integer number (86970672143).

Almost surely, 2^561101110550 is an apocalyptic number.

561101110550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

561101110550 is a deficient number, since it is larger than the sum of its proper divisors (482546955166).

561101110550 is a wasteful number, since it uses less digits than its factorization.

561101110550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11222022223 (or 11222022218 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 26.

The spelling of 561101110550 in words is "five hundred sixty-one billion, one hundred one million, one hundred ten thousand, five hundred fifty".