256166411 has 4 divisors (see below), whose sum is σ = 256203024. Its totient is φ = 256129800.

The previous prime is 256166369. The next prime is 256166431. The reversal of 256166411 is 114661652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 256166411 - 2¹⁰ = 256165387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256166431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4175 + ... + 23016.

It is an arithmetic number, because the mean of its divisors is an integer number (64050756).

Almost surely, 2^256166411 is an apocalyptic number.

256166411 is a deficient number, since it is larger than the sum of its proper divisors (36613).

256166411 is an equidigital number, since it uses as much as digits as its factorization.

256166411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36612.

The product of its digits is 8640, while the sum is 32.

The square root of 256166411 is about 16005.1994989128. The cubic root of 256166411 is about 635.0979748386.

The spelling of 256166411 in words is "two hundred fifty-six million, one hundred sixty-six thousand, four hundred eleven".