256705250147 has 2 divisors, whose sum is σ = 256705250148. Its totient is φ = 256705250146.

The previous prime is 256705250111. The next prime is 256705250167. The reversal of 256705250147 is 741052507652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256705250147 - 2⁸ = 256705249891 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 256705250098 and 256705250107.

It is not a weakly prime, because it can be changed into another prime (256705250167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128352625073 + 128352625074.

It is an arithmetic number, because the mean of its divisors is an integer number (128352625074).

Almost surely, 2^256705250147 is an apocalyptic number.

256705250147 is a deficient number, since it is larger than the sum of its proper divisors (1).

256705250147 is an equidigital number, since it uses as much as digits as its factorization.

256705250147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 588000, while the sum is 44.

Adding to 256705250147 its reverse (741052507652), we get a palindrome (997757757799).

The spelling of 256705250147 in words is "two hundred fifty-six billion, seven hundred five million, two hundred fifty thousand, one hundred forty-seven".