256743017217235 has 8 divisors (see below), whose sum is σ = 308661106099536. Its totient is φ = 205014756814560.

The previous prime is 256743017217233. The next prime is 256743017217241. The reversal of 256743017217235 is 532712710347652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256743017217235 - 2¹ = 256743017217233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256743017217233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47457116929 + ... + 47457122338.

It is an arithmetic number, because the mean of its divisors is an integer number (38582638262442).

Almost surely, 2^{256743017217235} is an apocalyptic number.

256743017217235 is a deficient number, since it is larger than the sum of its proper divisors (51918088882301).

256743017217235 is an equidigital number, since it uses as much as digits as its factorization.

256743017217235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94914239813.

The product of its (nonzero) digits is 14817600, while the sum is 55.

The spelling of 256743017217235 in words is "two hundred fifty-six trillion, seven hundred forty-three billion, seventeen million, two hundred seventeen thousand, two hundred thirty-five".