256744357110601 has 4 divisors (see below), whose sum is σ = 265597610804100. Its totient is φ = 247891103417104.

The previous prime is 256744357110559. The next prime is 256744357110607. The reversal of 256744357110601 is 106011753447652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 172607674624576 + 84136682486025 = 13138024^2 + 9172605^2 .

It is a cyclic number.

It is not a de Polignac number, because 256744357110601 - 2²⁵ = 256744323556169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256744357110607) 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, 4426626846706 + ... + 4426626846763.

It is an arithmetic number, because the mean of its divisors is an integer number (66399402701025).

Almost surely, 2^{256744357110601} is an apocalyptic number.

It is an amenable number.

256744357110601 is a deficient number, since it is larger than the sum of its proper divisors (8853253693499).

256744357110601 is an equidigital number, since it uses as much as digits as its factorization.

256744357110601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8853253693498.

The product of its (nonzero) digits is 4233600, while the sum is 52.

The spelling of 256744357110601 in words is "two hundred fifty-six trillion, seven hundred forty-four billion, three hundred fifty-seven million, one hundred ten thousand, six hundred one".