550561011111 has 6 divisors (see below), whose sum is σ = 795254793840. Its totient is φ = 367040674068.

The previous prime is 550561011109. The next prime is 550561011131. The reversal of 550561011111 is 111110165055.

550561011111 is a `hidden beast` number, since 550 + 5 + 6 + 101 + 1 + 1 + 1 + 1 = 666.

It is not a de Polignac number, because 550561011111 - 2¹ = 550561011109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550561011131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30586722831 + ... + 30586722848.

It is an arithmetic number, because the mean of its divisors is an integer number (132542465640).

Almost surely, 2^550561011111 is an apocalyptic number.

550561011111 is a deficient number, since it is larger than the sum of its proper divisors (244693782729).

550561011111 is a wasteful number, since it uses less digits than its factorization.

550561011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61173445685 (or 61173445682 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 27.

Adding to 550561011111 its reverse (111110165055), we get a palindrome (661671176166).

The spelling of 550561011111 in words is "five hundred fifty billion, five hundred sixty-one million, eleven thousand, one hundred eleven".