501222746642 has 18 divisors (see below), whose sum is σ = 756079502997. Its totient is φ = 249204155800.

The previous prime is 501222746627. The next prime is 501222746657. The reversal of 501222746642 is 246647222105.

It is an interprime number because it is at equal distance from previous prime (501222746627) and next prime (501222746657).

It can be written as a sum of positive squares in 2 ways, for example, as 441545631121 + 59677115521 = 664489^2 + 244289^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=500611.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 501222746642.

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 8 ways as a sum of consecutive naturals, for example, 191232092 + ... + 191234712.

Almost surely, 2^501222746642 is an apocalyptic number.

501222746642 is a deficient number, since it is larger than the sum of its proper divisors (254856756355).

501222746642 is an frugal number, since it uses more digits than its factorization.

501222746642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5626 (or 2814 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 41.

Adding to 501222746642 its reverse (246647222105), we get a palindrome (747869968747).

The spelling of 501222746642 in words is "five hundred one billion, two hundred twenty-two million, seven hundred forty-six thousand, six hundred forty-two".