256782071 has 16 divisors (see below), whose sum is σ = 316776768. Its totient is φ = 202694400.

The previous prime is 256782049. The next prime is 256782089. The reversal of 256782071 is 170287652.

It is a cyclic number.

It is not a de Polignac number, because 256782071 - 2¹⁴ = 256765687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256782011) 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 15 ways as a sum of consecutive naturals, for example, 38891 + ... + 45011.

It is an arithmetic number, because the mean of its divisors is an integer number (19798548).

Almost surely, 2^256782071 is an apocalyptic number.

256782071 is a deficient number, since it is larger than the sum of its proper divisors (59994697).

256782071 is a wasteful number, since it uses less digits than its factorization.

256782071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6602.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 256782071 is about 16024.4210815867. The cubic root of 256782071 is about 635.6063573828.

The spelling of 256782071 in words is "two hundred fifty-six million, seven hundred eighty-two thousand, seventy-one".