255663344020 has 144 divisors (see below), whose sum is σ = 637734883968. Its totient is φ = 84333150720.

The previous prime is 255663344011. The next prime is 255663344023. The reversal of 255663344020 is 20443366552.

It is a super-3 number, since 3×255663344020³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255663344023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34494115 + ... + 34501525.

It is an arithmetic number, because the mean of its divisors is an integer number (4428714472).

Almost surely, 2^255663344020 is an apocalyptic number.

255663344020 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 255663344020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318867441984).

255663344020 is an abundant number, since it is smaller than the sum of its proper divisors (382071539948).

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

255663344020 is a wasteful number, since it uses less digits than its factorization.

255663344020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7778 (or 7747 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 40.

The spelling of 255663344020 in words is "two hundred fifty-five billion, six hundred sixty-three million, three hundred forty-four thousand, twenty".