255355553280 has 640 divisors, whose sum is σ = 886700390400. Its totient is φ = 62518984704.

The previous prime is 255355553261. The next prime is 255355553281. The reversal of 255355553280 is 82355553552.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255355553281) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 581675301 + ... + 581675739.

It is an arithmetic number, because the mean of its divisors is an integer number (1385469360).

Almost surely, 2^255355553280 is an apocalyptic number.

255355553280 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 255355553280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (443350195200).

255355553280 is an abundant number, since it is smaller than the sum of its proper divisors (631344837120).

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

255355553280 is a wasteful number, since it uses less digits than its factorization.

255355553280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614 (or 598 counting only the distinct ones).

The product of its (nonzero) digits is 4500000, while the sum is 48.

The spelling of 255355553280 in words is "two hundred fifty-five billion, three hundred fifty-five million, five hundred fifty-three thousand, two hundred eighty".