550121856804 has 243 divisors, whose sum is σ = 1553624132697. Its totient is φ = 164052615168.

The previous prime is 550121856773. The next prime is 550121856833. The reversal of 550121856804 is 408658121055.

The square root of 550121856804 is 741702.

It is a perfect power (a square), and thus also a powerful number.

550121856804 is a `hidden beast` number, since 5 + 501 + 2 + 1 + 85 + 68 + 0 + 4 = 666.

It can be written as a sum of positive squares in 13 ways, for example, as 2000772900 + 548121083904 = 44730^2 + 740352^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 550121856804.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 2140551844 + ... + 2140552100.

Almost surely, 2^550121856804 is an apocalyptic number.

550121856804 is the 741702-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 550121856804

550121856804 is an abundant number, since it is smaller than the sum of its proper divisors (1003502275893).

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

550121856804 is a wasteful number, since it uses less digits than its factorization.

550121856804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 45.

Adding to 550121856804 its reverse (408658121055), we get a palindrome (958779977859).

The spelling of 550121856804 in words is "five hundred fifty billion, one hundred twenty-one million, eight hundred fifty-six thousand, eight hundred four".