505555005560 has 128 divisors (see below), whose sum is σ = 1274399308800. Its totient is φ = 178920245760.

The previous prime is 505555005559. The next prime is 505555005581. The reversal of 505555005560 is 65500555505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3633434 + ... + 3770006.

It is an arithmetic number, because the mean of its divisors is an integer number (9956244600).

Almost surely, 2^505555005560 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 505555005560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (637199654400).

505555005560 is an abundant number, since it is smaller than the sum of its proper divisors (768844303240).

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

505555005560 is a wasteful number, since it uses less digits than its factorization.

505555005560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136821 (or 136817 counting only the distinct ones).

The product of its (nonzero) digits is 468750, while the sum is 41.

The spelling of 505555005560 in words is "five hundred five billion, five hundred fifty-five million, five thousand, five hundred sixty".