550561601100 has 144 divisors (see below), whose sum is σ = 1826026071296. Its totient is φ = 125462304000.

The previous prime is 550561601071. The next prime is 550561601111. The reversal of 550561601100 is 1106165055.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 299070 + ... + 1091130.

Almost surely, 2^550561601100 is an apocalyptic number.

550561601100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 550561601100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (913013035648).

550561601100 is an abundant number, since it is smaller than the sum of its proper divisors (1275464470196).

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

550561601100 is a wasteful number, since it uses less digits than its factorization.

550561601100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792416 (or 792409 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 30.

Adding to 550561601100 its reverse (1106165055), we get a palindrome (551667766155).

The spelling of 550561601100 in words is "five hundred fifty billion, five hundred sixty-one million, six hundred one thousand, one hundred".