256236632671 has 2 divisors, whose sum is σ = 256236632672. Its totient is φ = 256236632670.

The previous prime is 256236632623. The next prime is 256236632681. The reversal of 256236632671 is 176236632652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256236632671 - 2¹¹ = 256236630623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256236632681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128118316335 + 128118316336.

It is an arithmetic number, because the mean of its divisors is an integer number (128118316336).

Almost surely, 2^256236632671 is an apocalyptic number.

256236632671 is a deficient number, since it is larger than the sum of its proper divisors (1).

256236632671 is an equidigital number, since it uses as much as digits as its factorization.

256236632671 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 256236632671 in words is "two hundred fifty-six billion, two hundred thirty-six million, six hundred thirty-two thousand, six hundred seventy-one".