503221166544 has 80 divisors (see below), whose sum is σ = 1318788342144. Its totient is φ = 165316300800.

The previous prime is 503221166533. The next prime is 503221166639. The reversal of 503221166544 is 445661122305.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9628804 + ... + 9680924.

Almost surely, 2^503221166544 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 503221166544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (659394171072).

503221166544 is an abundant number, since it is smaller than the sum of its proper divisors (815567175600).

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

503221166544 is a wasteful number, since it uses less digits than its factorization.

503221166544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55036 (or 55030 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

Adding to 503221166544 its reverse (445661122305), we get a palindrome (948882288849).

The spelling of 503221166544 in words is "five hundred three billion, two hundred twenty-one million, one hundred sixty-six thousand, five hundred forty-four".