505555005555 has 32 divisors (see below), whose sum is σ = 911076313920. Its totient is φ = 265935778560.

The previous prime is 505555005547. The next prime is 505555005559. The reversal of 505555005555 is 555500555505.

It is not a de Polignac number, because 505555005555 - 2³ = 505555005547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 505555005555.

It is not an unprimeable number, because it can be changed into a prime (505555005559) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25639816 + ... + 25659525.

It is an arithmetic number, because the mean of its divisors is an integer number (28471134810).

Almost surely, 2^505555005555 is an apocalyptic number.

505555005555 is a deficient number, since it is larger than the sum of its proper divisors (405521308365).

505555005555 is a wasteful number, since it uses less digits than its factorization.

505555005555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51299428 (or 51299422 counting only the distinct ones).

The product of its (nonzero) digits is 1953125, while the sum is 45.

The spelling of 505555005555 in words is "five hundred five billion, five hundred fifty-five million, five thousand, five hundred fifty-five".