550515856 has 160 divisors (see below), whose sum is σ = 1295917056. Its totient is φ = 223872000.

The previous prime is 550515851. The next prime is 550515871. The reversal of 550515856 is 658515055.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (550515851) 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, 5144955 + ... + 5145061.

Almost surely, 2^550515856 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 550515856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (647958528).

550515856 is an abundant number, since it is smaller than the sum of its proper divisors (745401200).

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

550515856 is a wasteful number, since it uses less digits than its factorization.

550515856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 150000, while the sum is 40.

The square root of 550515856 is about 23463.0743083680. The cubic root of 550515856 is about 819.5773431608.

The spelling of 550515856 in words is "five hundred fifty million, five hundred fifteen thousand, eight hundred fifty-six".