550403020040 has 32 divisors (see below), whose sum is σ = 1246294750680. Its totient is φ = 218758904832.

The previous prime is 550403019977. The next prime is 550403020051. The reversal of 550403020040 is 40020304055.

It can be written as a sum of positive squares in 4 ways, for example, as 339047669284 + 211355350756 = 582278^2 + 459734^2 .

It is a junction number, because it is equal to n+sod(n) for n = 550403019988 and 550403020015.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43815617 + ... + 43828176.

Almost surely, 2^550403020040 is an apocalyptic number.

It is an amenable number.

550403020040 is an abundant number, since it is smaller than the sum of its proper divisors (695891730640).

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

550403020040 is a wasteful number, since it uses less digits than its factorization.

550403020040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87643961 (or 87643957 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

Adding to 550403020040 its reverse (40020304055), we get a palindrome (590423324095).

The spelling of 550403020040 in words is "five hundred fifty billion, four hundred three million, twenty thousand, forty".