256743504214189 has 2 divisors, whose sum is σ = 256743504214190. Its totient is φ = 256743504214188.

The previous prime is 256743504214181. The next prime is 256743504214217. The reversal of 256743504214189 is 981412405347652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 226829714791689 + 29913789422500 = 15060867^2 + 5469350^2 .

It is a cyclic number.

It is not a de Polignac number, because 256743504214189 - 2³ = 256743504214181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256743504214181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128371752107094 + 128371752107095.

It is an arithmetic number, because the mean of its divisors is an integer number (128371752107095).

It is a 1-persistent number, because it is pandigital, but 2⋅256743504214189 = 513487008428378 is not.

Almost surely, 2^{256743504214189} is an apocalyptic number.

It is an amenable number.

256743504214189 is a deficient number, since it is larger than the sum of its proper divisors (1).

256743504214189 is an equidigital number, since it uses as much as digits as its factorization.

256743504214189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58060800, while the sum is 61.

The spelling of 256743504214189 in words is "two hundred fifty-six trillion, seven hundred forty-three billion, five hundred four million, two hundred fourteen thousand, one hundred eighty-nine".