256614763 has 2 divisors, whose sum is σ = 256614764. Its totient is φ = 256614762.

The previous prime is 256614727. The next prime is 256614769. The reversal of 256614763 is 367416652.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256614763 is a prime.

It is a super-2 number, since 2×256614763² = 131702273179092338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (256614769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128307381 + 128307382.

It is an arithmetic number, because the mean of its divisors is an integer number (128307382).

Almost surely, 2^256614763 is an apocalyptic number.

256614763 is a deficient number, since it is larger than the sum of its proper divisors (1).

256614763 is an equidigital number, since it uses as much as digits as its factorization.

256614763 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 40.

The square root of 256614763 is about 16019.1998239612. The cubic root of 256614763 is about 635.4682829288.

The spelling of 256614763 in words is "two hundred fifty-six million, six hundred fourteen thousand, seven hundred sixty-three".