505555403260 has 48 divisors (see below), whose sum is σ = 1099149458400. Its totient is φ = 195093618944.

The previous prime is 505555403251. The next prime is 505555403263. The reversal of 505555403260 is 62304555505.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505555403263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 384054 + ... + 1076386.

It is an arithmetic number, because the mean of its divisors is an integer number (22898947050).

Almost surely, 2^505555403260 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 505555403260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (549574729200).

505555403260 is an abundant number, since it is smaller than the sum of its proper divisors (593594055140).

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

505555403260 is a wasteful number, since it uses less digits than its factorization.

505555403260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693630 (or 693628 counting only the distinct ones).

The product of its (nonzero) digits is 450000, while the sum is 40.

Adding to 505555403260 its reverse (62304555505), we get a palindrome (567859958765).

The spelling of 505555403260 in words is "five hundred five billion, five hundred fifty-five million, four hundred three thousand, two hundred sixty".