505105505556 has 24 divisors (see below), whose sum is σ = 1179586018464. Its totient is φ = 168224715360.

The previous prime is 505105505543. The next prime is 505105505563. The reversal of 505105505556 is 655505501505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17958675 + ... + 17986778.

It is an arithmetic number, because the mean of its divisors is an integer number (49149417436).

Almost surely, 2^505105505556 is an apocalyptic number.

It is an amenable number.

505105505556 is an abundant number, since it is smaller than the sum of its proper divisors (674480512908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

505105505556 is a wasteful number, since it uses less digits than its factorization.

505105505556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35946631 (or 35946629 counting only the distinct ones).

The product of its (nonzero) digits is 468750, while the sum is 42.

The spelling of 505105505556 in words is "five hundred five billion, one hundred five million, five hundred five thousand, five hundred fifty-six".