256555063 has 2 divisors, whose sum is σ = 256555064. Its totient is φ = 256555062.

The previous prime is 256555027. The next prime is 256555099. The reversal of 256555063 is 360555652.

It is a balanced prime because it is at equal distance from previous prime (256555027) and next prime (256555099).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256555063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256555463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128277531 + 128277532.

It is an arithmetic number, because the mean of its divisors is an integer number (128277532).

Almost surely, 2^256555063 is an apocalyptic number.

256555063 is a deficient number, since it is larger than the sum of its proper divisors (1).

256555063 is an equidigital number, since it uses as much as digits as its factorization.

256555063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 135000, while the sum is 37.

The square root of 256555063 is about 16017.3363266181. The cubic root of 256555063 is about 635.4189997174.

The spelling of 256555063 in words is "two hundred fifty-six million, five hundred fifty-five thousand, sixty-three".