500221416645 has 20 divisors (see below), whose sum is σ = 896693206860. Its totient is φ = 266784755328.

The previous prime is 500221416623. The next prime is 500221416647. The reversal of 500221416645 is 546614122005.

500221416645 is a `hidden beast` number, since 5 + 0 + 0 + 2 + 2 + 1 + 4 + 1 + 6 + 645 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 183349245249 + 316872171396 = 428193^2 + 562914^2 .

It is not a de Polignac number, because 500221416645 - 2⁵ = 500221416613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500221416647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 617556900 + ... + 617557709.

It is an arithmetic number, because the mean of its divisors is an integer number (44834660343).

Almost surely, 2^500221416645 is an apocalyptic number.

It is an amenable number.

500221416645 is a deficient number, since it is larger than the sum of its proper divisors (396471790215).

500221416645 is a wasteful number, since it uses less digits than its factorization.

500221416645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235114626 (or 1235114617 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 500221416645 in words is "five hundred billion, two hundred twenty-one million, four hundred sixteen thousand, six hundred forty-five".