551111101011 has 12 divisors (see below), whose sum is σ = 815465206920. Its totient is φ = 358446244320.

The previous prime is 551111100979. The next prime is 551111101027. The reversal of 551111101011 is 110101111155.

551111101011 is a `hidden beast` number, since 551 + 1 + 1 + 1 + 10 + 101 + 1 = 666.

It is not a de Polignac number, because 551111101011 - 2⁵ = 551111100979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551111101031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 746762641 + ... + 746763378.

It is an arithmetic number, because the mean of its divisors is an integer number (67955433910).

Almost surely, 2^551111101011 is an apocalyptic number.

551111101011 is a deficient number, since it is larger than the sum of its proper divisors (264354105909).

551111101011 is a wasteful number, since it uses less digits than its factorization.

551111101011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493526066 (or 1493526063 counting only the distinct ones).

The product of its (nonzero) digits is 25, while the sum is 18.

Adding to 551111101011 its reverse (110101111155), we get a palindrome (661212212166).

The spelling of 551111101011 in words is "five hundred fifty-one billion, one hundred eleven million, one hundred one thousand, eleven".