255565120650624 has 160 divisors (see below), whose sum is σ = 760595974835400. Its totient is φ = 85184081768448.

The previous prime is 255565120650557. The next prime is 255565120650629. The reversal of 255565120650624 is 426056021565552.

It is a happy number.

255565120650624 is a `hidden beast` number, since 2 + 5 + 5 + 5 + 6 + 5 + 1 + 2 + 0 + 6 + 5 + 0 + 624 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255565120650629) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 208584307 + ... + 209805965.

Almost surely, 2^{255565120650624} is an apocalyptic number.

255565120650624 is a gapful number since it is divisible by the number (24) 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 255565120650624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (380297987417700).

255565120650624 is an abundant number, since it is smaller than the sum of its proper divisors (505030854184776).

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

255565120650624 is a wasteful number, since it uses less digits than its factorization.

255565120650624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241862 (or 1241841 counting only the distinct ones).

The product of its (nonzero) digits is 21600000, while the sum is 54.

The spelling of 255565120650624 in words is "two hundred fifty-five trillion, five hundred sixty-five billion, one hundred twenty million, six hundred fifty thousand, six hundred twenty-four".