256846463 has 2 divisors, whose sum is σ = 256846464. Its totient is φ = 256846462.

The previous prime is 256846453. The next prime is 256846477. The reversal of 256846463 is 364648652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256846463 - 2¹² = 256842367 is a prime.

It is a super-2 number, since 2×256846463² = 131940211111220738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256846423) 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 as a sum of consecutive naturals, namely, 128423231 + 128423232.

It is an arithmetic number, because the mean of its divisors is an integer number (128423232).

Almost surely, 2^256846463 is an apocalyptic number.

256846463 is a deficient number, since it is larger than the sum of its proper divisors (1).

256846463 is an equidigital number, since it uses as much as digits as its factorization.

256846463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 44.

The square root of 256846463 is about 16026.4301389923. The cubic root of 256846463 is about 635.6594822548.

The spelling of 256846463 in words is "two hundred fifty-six million, eight hundred forty-six thousand, four hundred sixty-three".