256160889 has 12 divisors (see below), whose sum is σ = 373469616. Its totient is φ = 169177272.

The previous prime is 256160851. The next prime is 256160893. The reversal of 256160889 is 988061652.

256160889 is a `hidden beast` number, since 2 + 561 + 6 + 0 + 8 + 89 = 666.

It is not a de Polignac number, because 256160889 - 2¹² = 256156793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256160809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132039 + ... + 133964.

It is an arithmetic number, because the mean of its divisors is an integer number (31122468).

Almost surely, 2^256160889 is an apocalyptic number.

It is an amenable number.

256160889 is a deficient number, since it is larger than the sum of its proper divisors (117308727).

256160889 is a wasteful number, since it uses less digits than its factorization.

256160889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266116 (or 266113 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 256160889 is about 16005.0269915424. The cubic root of 256160889 is about 635.0934113516.

It can be divided in two parts, 256160 and 889, that added together give a square (257049 = 507²).

The spelling of 256160889 in words is "two hundred fifty-six million, one hundred sixty thousand, eight hundred eighty-nine".