256057673699 has 2 divisors, whose sum is σ = 256057673700. Its totient is φ = 256057673698.

The previous prime is 256057673687. The next prime is 256057673719. The reversal of 256057673699 is 996376750652.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256057673699 is a prime.

It is not a weakly prime, because it can be changed into another prime (256057673629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128028836849 + 128028836850.

It is an arithmetic number, because the mean of its divisors is an integer number (128028836850).

Almost surely, 2^256057673699 is an apocalyptic number.

256057673699 is a deficient number, since it is larger than the sum of its proper divisors (1).

256057673699 is an equidigital number, since it uses as much as digits as its factorization.

256057673699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128595600, while the sum is 65.

The spelling of 256057673699 in words is "two hundred fifty-six billion, fifty-seven million, six hundred seventy-three thousand, six hundred ninety-nine".