256363664071 has 4 divisors (see below), whose sum is σ = 256364682112. Its totient is φ = 256362646032.

The previous prime is 256363664069. The next prime is 256363664093. The reversal of 256363664071 is 170466363652.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 256363664071 - 2¹ = 256363664069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256363664771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176026 + ... + 737368.

It is an arithmetic number, because the mean of its divisors is an integer number (64091170528).

Almost surely, 2^256363664071 is an apocalyptic number.

256363664071 is a deficient number, since it is larger than the sum of its proper divisors (1018041).

256363664071 is an equidigital number, since it uses as much as digits as its factorization.

256363664071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018040.

The product of its (nonzero) digits is 3265920, while the sum is 49.

The spelling of 256363664071 in words is "two hundred fifty-six billion, three hundred sixty-three million, six hundred sixty-four thousand, seventy-one".