5555621000 has 64 divisors (see below), whose sum is σ = 13119678000. Its totient is φ = 2201817600.

The previous prime is 5555620943. The next prime is 5555621009. The reversal of 5555621000 is 1265555.

It can be written as a sum of positive squares in 8 ways, for example, as 41964484 + 5513656516 = 6478^2 + 74254^2 .

It is not an unprimeable number, because it can be changed into a prime (5555621009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83516 + ... + 134484.

Almost surely, 2^5555621000 is an apocalyptic number.

5555621000 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 5555621000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6559839000).

5555621000 is an abundant number, since it is smaller than the sum of its proper divisors (7564057000).

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

5555621000 is a wasteful number, since it uses less digits than its factorization.

5555621000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51099 (or 51085 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 5555621000 is about 74536.0382633797. The cubic root of 5555621000 is about 1771.1045697870.

Adding to 5555621000 its reverse (1265555), we get a palindrome (5556886555).

The spelling of 5555621000 in words is "five billion, five hundred fifty-five million, six hundred twenty-one thousand".