505280505280 has 112 divisors (see below), whose sum is σ = 1216004415840. Its totient is φ = 199964160000.

The previous prime is 505280505269. The next prime is 505280505281. The reversal of 505280505280 is 82505082505.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505280505281) 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, 51028330 + ... + 51038230.

Almost surely, 2^505280505280 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 505280505280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (608002207920).

505280505280 is an abundant number, since it is smaller than the sum of its proper divisors (710723910560).

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

505280505280 is a wasteful number, since it uses less digits than its factorization.

505280505280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11598 (or 11588 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 40.

Adding to 505280505280 its reverse (82505082505), we get a palindrome (587785587785).

The spelling of 505280505280 in words is "five hundred five billion, two hundred eighty million, five hundred five thousand, two hundred eighty".