550550511111 has 32 divisors (see below), whose sum is σ = 790324516800. Its totient is φ = 339674480640.

The previous prime is 550550511101. The next prime is 550550511131. The reversal of 550550511111 is 111115055055.

It is a happy number.

It is not a de Polignac number, because 550550511111 - 2¹⁰ = 550550510087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550550511101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 486495 + ... + 1156623.

It is an arithmetic number, because the mean of its divisors is an integer number (24697641150).

Almost surely, 2^550550511111 is an apocalyptic number.

550550511111 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

550550511111 is a deficient number, since it is larger than the sum of its proper divisors (239774005689).

550550511111 is a wasteful number, since it uses less digits than its factorization.

550550511111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670419.

The product of its (nonzero) digits is 3125, while the sum is 30.

Adding to 550550511111 its reverse (111115055055), we get a palindrome (661665566166).

The spelling of 550550511111 in words is "five hundred fifty billion, five hundred fifty million, five hundred eleven thousand, one hundred eleven".