550504321920 has 1152 divisors, whose sum is σ = 2395002880800. Its totient is φ = 119140761600.

The previous prime is 550504321903. The next prime is 550504321931. The reversal of 550504321920 is 29123405055.

It is a happy number.

550504321920 is a `hidden beast` number, since 5 + 505 + 0 + 43 + 21 + 92 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 305665020 + ... + 305666820.

Almost surely, 2^550504321920 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 550504321920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1197501440400).

550504321920 is an abundant number, since it is smaller than the sum of its proper divisors (1844498558880).

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

550504321920 is a wasteful number, since it uses less digits than its factorization.

550504321920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1881 (or 1837 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

Adding to 550504321920 its reverse (29123405055), we get a palindrome (579627726975).

The spelling of 550504321920 in words is "five hundred fifty billion, five hundred four million, three hundred twenty-one thousand, nine hundred twenty".