551010561100 has 72 divisors (see below), whose sum is σ = 1214458675920. Its totient is φ = 216966942720.

The previous prime is 551010561029. The next prime is 551010561107. The reversal of 551010561100 is 1165010155.

It is a super-3 number, since 3×551010561100³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (551010561107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1883932 + ... + 2156668.

It is an arithmetic number, because the mean of its divisors is an integer number (16867481610).

Almost surely, 2^551010561100 is an apocalyptic number.

551010561100 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 551010561100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (607229337960).

551010561100 is an abundant number, since it is smaller than the sum of its proper divisors (663448114820).

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

551010561100 is a wasteful number, since it uses less digits than its factorization.

551010561100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273067 (or 273060 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 25.

Adding to 551010561100 its reverse (1165010155), we get a palindrome (552175571255).

The spelling of 551010561100 in words is "five hundred fifty-one billion, ten million, five hundred sixty-one thousand, one hundred".