255664112220 has 144 divisors (see below), whose sum is σ = 846309915360. Its totient is φ = 61957632000.

The previous prime is 255664112203. The next prime is 255664112257. The reversal of 255664112220 is 22211466552.

255664112220 is a `hidden beast` number, since 2 + 5 + 5 + 6 + 641 + 1 + 2 + 2 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6095320 + ... + 6137120.

It is an arithmetic number, because the mean of its divisors is an integer number (5877152190).

Almost surely, 2^255664112220 is an apocalyptic number.

255664112220 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 255664112220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (423154957680).

255664112220 is an abundant number, since it is smaller than the sum of its proper divisors (590645803140).

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

255664112220 is a wasteful number, since it uses less digits than its factorization.

255664112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44916 (or 44911 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

Adding to 255664112220 its reverse (22211466552), we get a palindrome (277875578772).

The spelling of 255664112220 in words is "two hundred fifty-five billion, six hundred sixty-four million, one hundred twelve thousand, two hundred twenty".