505500555109 has 16 divisors (see below), whose sum is σ = 564894190080. Its totient is φ = 448370037360.

The previous prime is 505500555029. The next prime is 505500555143. The reversal of 505500555109 is 901555005505.

It is a cyclic number.

It is not a de Polignac number, because 505500555109 - 2⁷ = 505500554981 is a prime.

It is a super-2 number, since 2×505500555109² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505500555149) 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, 146767 + ... + 1016140.

It is an arithmetic number, because the mean of its divisors is an integer number (35305886880).

Almost surely, 2^505500555109 is an apocalyptic number.

It is an amenable number.

505500555109 is a deficient number, since it is larger than the sum of its proper divisors (59393634971).

505500555109 is a wasteful number, since it uses less digits than its factorization.

505500555109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163880.

The product of its (nonzero) digits is 140625, while the sum is 40.

The spelling of 505500555109 in words is "five hundred five billion, five hundred million, five hundred fifty-five thousand, one hundred nine".