551322545500 has 96 divisors (see below), whose sum is σ = 1211397707520. Its totient is φ = 219192422400.

The previous prime is 551322545489. The next prime is 551322545513. The reversal of 551322545500 is 5545223155.

It is a self number, because there is not a number n which added to its sum of digits gives 551322545500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164916829 + ... + 164920171.

It is an arithmetic number, because the mean of its divisors is an integer number (12618726120).

Almost surely, 2^551322545500 is an apocalyptic number.

551322545500 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 551322545500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (605698853760).

551322545500 is an abundant number, since it is smaller than the sum of its proper divisors (660075162020).

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

551322545500 is a wasteful number, since it uses less digits than its factorization.

551322545500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5264 (or 5252 counting only the distinct ones).

The product of its (nonzero) digits is 150000, while the sum is 37.

Adding to 551322545500 its reverse (5545223155), we get a palindrome (556867768655).

The spelling of 551322545500 in words is "five hundred fifty-one billion, three hundred twenty-two million, five hundred forty-five thousand, five hundred".