550563640 has 128 divisors (see below), whose sum is σ = 1401753600. Its totient is φ = 192890880.

The previous prime is 550563631. The next prime is 550563641. The reversal of 550563640 is 46365055.

It is a junction number, because it is equal to n+sod(n) for n = 550563596 and 550563605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550563641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1633552 + ... + 1633888.

It is an arithmetic number, because the mean of its divisors is an integer number (10951200).

Almost surely, 2^550563640 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 550563640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (700876800).

550563640 is an abundant number, since it is smaller than the sum of its proper divisors (851189960).

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

550563640 is a wasteful number, since it uses less digits than its factorization.

550563640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 481 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 34.

The square root of 550563640 is about 23464.0925671546. The cubic root of 550563640 is about 819.6010551940.

The spelling of 550563640 in words is "five hundred fifty million, five hundred sixty-three thousand, six hundred forty".