550551555840 has 576 divisors, whose sum is σ = 2080873105920. Its totient is φ = 122297057280.

The previous prime is 550551555839. The next prime is 550551555847. The reversal of 550551555840 is 48555155055.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 550551555840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550551555847) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 76324074 + ... + 76331286.

It is an arithmetic number, because the mean of its divisors is an integer number (3612626920).

Almost surely, 2^550551555840 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 550551555840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1040436552960).

550551555840 is an abundant number, since it is smaller than the sum of its proper divisors (1530321550080).

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

550551555840 is a wasteful number, since it uses less digits than its factorization.

550551555840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7400 (or 7386 counting only the distinct ones).

The product of its (nonzero) digits is 2500000, while the sum is 48.

The spelling of 550551555840 in words is "five hundred fifty billion, five hundred fifty-one million, five hundred fifty-five thousand, eight hundred forty".