505505106111 has 4 divisors (see below), whose sum is σ = 674006808152. Its totient is φ = 337003404072.

The previous prime is 505505106107. The next prime is 505505106121. The reversal of 505505106111 is 111601505505.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 505505106111 - 2² = 505505106107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505505106121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84250851016 + ... + 84250851021.

It is an arithmetic number, because the mean of its divisors is an integer number (168501702038).

Almost surely, 2^505505106111 is an apocalyptic number.

505505106111 is a deficient number, since it is larger than the sum of its proper divisors (168501702041).

505505106111 is a wasteful number, since it uses less digits than its factorization.

505505106111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168501702040.

The product of its (nonzero) digits is 3750, while the sum is 30.

The spelling of 505505106111 in words is "five hundred five billion, five hundred five million, one hundred six thousand, one hundred eleven".