550061556561 has 16 divisors (see below), whose sum is σ = 888988374720. Its totient is φ = 333370640160.

The previous prime is 550061556529. The next prime is 550061556613. The reversal of 550061556561 is 165655160055.

It is not a de Polignac number, because 550061556561 - 2⁵ = 550061556529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (550061516561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 926029260 + ... + 926029853.

It is an arithmetic number, because the mean of its divisors is an integer number (55561773420).

Almost surely, 2^550061556561 is an apocalyptic number.

It is an amenable number.

550061556561 is a deficient number, since it is larger than the sum of its proper divisors (338926818159).

550061556561 is a wasteful number, since it uses less digits than its factorization.

550061556561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1852059133 (or 1852059127 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 45.

The spelling of 550061556561 in words is "five hundred fifty billion, sixty-one million, five hundred fifty-six thousand, five hundred sixty-one".