256443763 has 2 divisors, whose sum is σ = 256443764. Its totient is φ = 256443762.

The previous prime is 256443743. The next prime is 256443769. The reversal of 256443763 is 367344652.

256443763 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256443763 - 2⁵ = 256443731 is a prime.

It is not a weakly prime, because it can be changed into another prime (256443769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128221881 + 128221882.

It is an arithmetic number, because the mean of its divisors is an integer number (128221882).

Almost surely, 2^256443763 is an apocalyptic number.

256443763 is a deficient number, since it is larger than the sum of its proper divisors (1).

256443763 is an equidigital number, since it uses as much as digits as its factorization.

256443763 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 40.

The square root of 256443763 is about 16013.8615892607. The cubic root of 256443763 is about 635.3270995443.

The spelling of 256443763 in words is "two hundred fifty-six million, four hundred forty-three thousand, seven hundred sixty-three".