420555003505 has 24 divisors (see below), whose sum is σ = 624540186432. Its totient is φ = 266197449024.

The previous prime is 420555003457. The next prime is 420555003509. The reversal of 420555003505 is 505300555024.

It is not a de Polignac number, because 420555003505 - 2¹¹ = 420555001457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420555003509) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 35543959 + ... + 35555788.

It is an arithmetic number, because the mean of its divisors is an integer number (26022507768).

Almost surely, 2^420555003505 is an apocalyptic number.

It is an amenable number.

420555003505 is a deficient number, since it is larger than the sum of its proper divisors (203985182927).

420555003505 is a wasteful number, since it uses less digits than its factorization.

420555003505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71099785 (or 71099772 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 34.

Adding to 420555003505 its reverse (505300555024), we get a palindrome (925855558529).

The spelling of 420555003505 in words is "four hundred twenty billion, five hundred fifty-five million, three thousand, five hundred five".