256064671 has 2 divisors, whose sum is σ = 256064672. Its totient is φ = 256064670.

The previous prime is 256064657. The next prime is 256064689. The reversal of 256064671 is 176460652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256064671 - 2¹⁷ = 255933599 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256064671.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256064971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128032335 + 128032336.

It is an arithmetic number, because the mean of its divisors is an integer number (128032336).

Almost surely, 2^256064671 is an apocalyptic number.

256064671 is a deficient number, since it is larger than the sum of its proper divisors (1).

256064671 is an equidigital number, since it uses as much as digits as its factorization.

256064671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 256064671 is about 16002.0208411313. The cubic root of 256064671 is about 635.0138844175.

The spelling of 256064671 in words is "two hundred fifty-six million, sixty-four thousand, six hundred seventy-one".