255505645056 has 80 divisors (see below), whose sum is σ = 681614637264. Its totient is φ = 85051981824.

The previous prime is 255505645049. The next prime is 255505645069. The reversal of 255505645056 is 650546505552.

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

It is a junction number, because it is equal to n+sod(n) for n = 255505644996 and 255505645014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1012420 + ... + 1239356.

Almost surely, 2^255505645056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255505645056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340807318632).

255505645056 is an abundant number, since it is smaller than the sum of its proper divisors (426108992208).

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

255505645056 is an equidigital number, since it uses as much as digits as its factorization.

255505645056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227691 (or 227675 counting only the distinct ones).

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

The spelling of 255505645056 in words is "two hundred fifty-five billion, five hundred five million, six hundred forty-five thousand, fifty-six".