256255802055 has 48 divisors (see below), whose sum is σ = 487529318016. Its totient is φ = 123482957760.

The previous prime is 256255802041. The next prime is 256255802057. The reversal of 256255802055 is 550208552652.

256255802055 is a `hidden beast` number, since 2 + 5 + 62 + 5 + 580 + 2 + 0 + 5 + 5 = 666.

It is not a de Polignac number, because 256255802055 - 2¹¹ = 256255800007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 256255802055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256255802057) 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, 1507317 + ... + 1668686.

It is an arithmetic number, because the mean of its divisors is an integer number (10156860792).

Almost surely, 2^256255802055 is an apocalyptic number.

256255802055 is a deficient number, since it is larger than the sum of its proper divisors (231273515961).

256255802055 is a wasteful number, since it uses less digits than its factorization.

256255802055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3176188 (or 3176185 counting only the distinct ones).

The product of its (nonzero) digits is 1200000, while the sum is 45.

The spelling of 256255802055 in words is "two hundred fifty-six billion, two hundred fifty-five million, eight hundred two thousand, fifty-five".