5561556500 has 96 divisors (see below), whose sum is σ = 12873719040. Its totient is φ = 2093040000.

The previous prime is 5561556493. The next prime is 5561556503. The reversal of 5561556500 is 56551655.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5561556503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1432562 + ... + 1436438.

It is an arithmetic number, because the mean of its divisors is an integer number (134101240).

Almost surely, 2^5561556500 is an apocalyptic number.

5561556500 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 5561556500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6436859520).

5561556500 is an abundant number, since it is smaller than the sum of its proper divisors (7312162540).

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

5561556500 is a wasteful number, since it uses less digits than its factorization.

5561556500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4066 (or 4054 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 38.

The square root of 5561556500 is about 74575.8439442692. The cubic root of 5561556500 is about 1771.7350813392.

The spelling of 5561556500 in words is "five billion, five hundred sixty-one million, five hundred fifty-six thousand, five hundred".