505611111011 has 16 divisors (see below), whose sum is σ = 519417360000. Its totient is φ = 491936040960.

The previous prime is 505611111007. The next prime is 505611111041. The reversal of 505611111011 is 110111116505.

It is a cyclic number.

It is not a de Polignac number, because 505611111011 - 2² = 505611111007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505611111041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11542631 + ... + 11586351.

It is an arithmetic number, because the mean of its divisors is an integer number (32463585000).

Almost surely, 2^505611111011 is an apocalyptic number.

505611111011 is a deficient number, since it is larger than the sum of its proper divisors (13806248989).

505611111011 is a wasteful number, since it uses less digits than its factorization.

505611111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45214.

The product of its (nonzero) digits is 150, while the sum is 23.

Adding to 505611111011 its reverse (110111116505), we get a palindrome (615722227516).

The spelling of 505611111011 in words is "five hundred five billion, six hundred eleven million, one hundred eleven thousand, eleven".