505166004220 has 48 divisors (see below), whose sum is σ = 1067776905888. Its totient is φ = 200747704320.

The previous prime is 505166004197. The next prime is 505166004221. The reversal of 505166004220 is 22400661505.

It is a super-4 number, since 4×505166004220⁴ (a number of 48 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505166004221) 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, 8632660 + ... + 8690980.

It is an arithmetic number, because the mean of its divisors is an integer number (22245352206).

Almost surely, 2^505166004220 is an apocalyptic number.

It is an amenable number.

505166004220 is an abundant number, since it is smaller than the sum of its proper divisors (562610901668).

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

505166004220 is a wasteful number, since it uses less digits than its factorization.

505166004220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61150 (or 61148 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 505166004220 its reverse (22400661505), we get a palindrome (527566665725).

The spelling of 505166004220 in words is "five hundred five billion, one hundred sixty-six million, four thousand, two hundred twenty".