256705250111 has 2 divisors, whose sum is σ = 256705250112. Its totient is φ = 256705250110.

The previous prime is 256705250099. The next prime is 256705250147. The reversal of 256705250111 is 111052507652.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256705250111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256705250311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128352625055 + 128352625056.

It is an arithmetic number, because the mean of its divisors is an integer number (128352625056).

Almost surely, 2^256705250111 is an apocalyptic number.

256705250111 is a deficient number, since it is larger than the sum of its proper divisors (1).

256705250111 is an equidigital number, since it uses as much as digits as its factorization.

256705250111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21000, while the sum is 35.

Adding to 256705250111 its reverse (111052507652), we get a palindrome (367757757763).

The spelling of 256705250111 in words is "two hundred fifty-six billion, seven hundred five million, two hundred fifty thousand, one hundred eleven".