505555403255 has 16 divisors (see below), whose sum is σ = 694279043904. Its totient is φ = 346193602560.

The previous prime is 505555403251. The next prime is 505555403263. The reversal of 505555403255 is 552304555505.

It is not a de Polignac number, because 505555403255 - 2² = 505555403251 is a prime.

It is a super-3 number, since 3×505555403255³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505555403251) 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, 9827306 + ... + 9878615.

It is an arithmetic number, because the mean of its divisors is an integer number (43392440244).

Almost surely, 2^505555403255 is an apocalyptic number.

505555403255 is a deficient number, since it is larger than the sum of its proper divisors (188723640649).

505555403255 is a wasteful number, since it uses less digits than its factorization.

505555403255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19706666.

The product of its (nonzero) digits is 1875000, while the sum is 44.

The spelling of 505555403255 in words is "five hundred five billion, five hundred fifty-five million, four hundred three thousand, two hundred fifty-five".