550355040400 has 240 divisors, whose sum is σ = 1495437285888. Its totient is φ = 192830976000.

The previous prime is 550355040371. The next prime is 550355040401. The reversal of 550355040400 is 4040553055.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (550355040401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31772542 + ... + 31789858.

Almost surely, 2^550355040400 is an apocalyptic number.

550355040400 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 550355040400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (747718642944).

550355040400 is an abundant number, since it is smaller than the sum of its proper divisors (945082245488).

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

550355040400 is a wasteful number, since it uses less digits than its factorization.

550355040400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17610 (or 17599 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 31.

Adding to 550355040400 its reverse (4040553055), we get a palindrome (554395593455).

The spelling of 550355040400 in words is "five hundred fifty billion, three hundred fifty-five million, forty thousand, four hundred".