256446771 has 8 divisors (see below), whose sum is σ = 390776064. Its totient is φ = 146541000.

The previous prime is 256446769. The next prime is 256446821. The reversal of 256446771 is 177644652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256446771 - 2¹ = 256446769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256446271) 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 7 ways as a sum of consecutive naturals, for example, 6105855 + ... + 6105896.

It is an arithmetic number, because the mean of its divisors is an integer number (48847008).

Almost surely, 2^256446771 is an apocalyptic number.

256446771 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

256446771 is a deficient number, since it is larger than the sum of its proper divisors (134329293).

256446771 is a wasteful number, since it uses less digits than its factorization.

256446771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12211761.

The product of its digits is 282240, while the sum is 42.

The square root of 256446771 is about 16013.9555076190. The cubic root of 256446771 is about 635.3295835930.

The spelling of 256446771 in words is "two hundred fifty-six million, four hundred forty-six thousand, seven hundred seventy-one".