655550505558 has 48 divisors (see below), whose sum is σ = 1586270374416. Its totient is φ = 201707845920.

The previous prime is 655550505523. The next prime is 655550505569. The reversal of 655550505558 is 855505055556.

It is a super-3 number, since 3×655550505558³ (a number of 36 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

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 23 ways as a sum of consecutive naturals, for example, 51873273 + ... + 51885908.

It is an arithmetic number, because the mean of its divisors is an integer number (33047299467).

Almost surely, 2^655550505558 is an apocalyptic number.

655550505558 is an abundant number, since it is smaller than the sum of its proper divisors (930719868858).

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

655550505558 is a wasteful number, since it uses less digits than its factorization.

655550505558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103759211 (or 103759199 counting only the distinct ones).

The product of its (nonzero) digits is 18750000, while the sum is 54.

The spelling of 655550505558 in words is "six hundred fifty-five billion, five hundred fifty million, five hundred five thousand, five hundred fifty-eight".