256517413647443 has 8 divisors (see below), whose sum is σ = 276262441807968. Its totient is φ = 236774231118144.

The previous prime is 256517413647433. The next prime is 256517413647449. The reversal of 256517413647443 is 344746314715652.

256517413647443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 256517413647443 - 2³⁴ = 256500233778259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256517413647449) 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, 461119130 + ... + 461675087.

It is an arithmetic number, because the mean of its divisors is an integer number (34532805225996).

Almost surely, 2^{256517413647443} is an apocalyptic number.

256517413647443 is a deficient number, since it is larger than the sum of its proper divisors (19745028160525).

256517413647443 is a wasteful number, since it uses less digits than its factorization.

256517413647443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922815613.

The product of its digits is 203212800, while the sum is 62.

The spelling of 256517413647443 in words is "two hundred fifty-six trillion, five hundred seventeen billion, four hundred thirteen million, six hundred forty-seven thousand, four hundred forty-three".