55205665000 has 80 divisors (see below), whose sum is σ = 132843179700. Its totient is φ = 21485376000.

The previous prime is 55205664989. The next prime is 55205665001. The reversal of 55205665000 is 56650255.

It is a happy number.

It can be written as a sum of positive squares in 10 ways, for example, as 1991479876 + 53214185124 = 44626^2 + 230682^2 .

It is not an unprimeable number, because it can be changed into a prime (55205665001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 35796 + ... + 334204.

Almost surely, 2^55205665000 is an apocalyptic number.

55205665000 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 55205665000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66421589850).

55205665000 is an abundant number, since it is smaller than the sum of its proper divisors (77637514700).

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

55205665000 is a wasteful number, since it uses less digits than its factorization.

55205665000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298472 (or 298453 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 34.

The spelling of 55205665000 in words is "fifty-five billion, two hundred five million, six hundred sixty-five thousand".