255550240000 has 720 divisors, whose sum is σ = 744799587840. Its totient is φ = 86563840000.

The previous prime is 255550239949. The next prime is 255550240007. The reversal of 255550240000 is 42055552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255550240007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2388319947 + ... + 2388320053.

It is an arithmetic number, because the mean of its divisors is an integer number (1034443872).

Almost surely, 2^255550240000 is an apocalyptic number.

255550240000 is a gapful number since it is divisible by the number (20) 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 255550240000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (372399793920).

255550240000 is an abundant number, since it is smaller than the sum of its proper divisors (489249347840).

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

255550240000 is a wasteful number, since it uses less digits than its factorization.

255550240000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 28.

Adding to 255550240000 its reverse (42055552), we get a palindrome (255592295552).

The spelling of 255550240000 in words is "two hundred fifty-five billion, five hundred fifty million, two hundred forty thousand".