256754640013543 has 8 divisors (see below), whose sum is σ = 293477847661088. Its totient is φ = 220042425705984.

The previous prime is 256754640013523. The next prime is 256754640013567. The reversal of 256754640013543 is 345310046457652.

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

It is not a de Polignac number, because 256754640013543 - 2³⁷ = 256617201060071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256754640013523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2748284946 + ... + 2748378367.

It is an arithmetic number, because the mean of its divisors is an integer number (36684730957636).

Almost surely, 2^{256754640013543} is an apocalyptic number.

256754640013543 is a deficient number, since it is larger than the sum of its proper divisors (36723207647545).

256754640013543 is an equidigital number, since it uses as much as digits as its factorization.

256754640013543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5496669993.

The product of its (nonzero) digits is 36288000, while the sum is 55.

The spelling of 256754640013543 in words is "two hundred fifty-six trillion, seven hundred fifty-four billion, six hundred forty million, thirteen thousand, five hundred forty-three".