256025281155 has 64 divisors (see below), whose sum is σ = 476956615680. Its totient is φ = 114848285184.

The previous prime is 256025281153. The next prime is 256025281163. The reversal of 256025281155 is 551182520652.

256025281155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 256025281155 - 2¹ = 256025281153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256025281153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3413517 + ... + 3487713.

It is an arithmetic number, because the mean of its divisors is an integer number (7452447120).

Almost surely, 2^256025281155 is an apocalyptic number.

256025281155 is a deficient number, since it is larger than the sum of its proper divisors (220931334525).

256025281155 is a wasteful number, since it uses less digits than its factorization.

256025281155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74828.

The product of its (nonzero) digits is 240000, while the sum is 42.

The spelling of 256025281155 in words is "two hundred fifty-six billion, twenty-five million, two hundred eighty-one thousand, one hundred fifty-five".