256573324717 has 8 divisors (see below), whose sum is σ = 258951862400. Its totient is φ = 254195235504.

The previous prime is 256573324699. The next prime is 256573324757. The reversal of 256573324717 is 717423375652.

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 256573324717 - 2¹¹ = 256573322669 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 (256573324757) 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, 1097584 + ... + 1310662.

It is an arithmetic number, because the mean of its divisors is an integer number (32368982800).

Almost surely, 2^256573324717 is an apocalyptic number.

It is an amenable number.

256573324717 is a deficient number, since it is larger than the sum of its proper divisors (2378537683).

256573324717 is a wasteful number, since it uses less digits than its factorization.

256573324717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224235.

The product of its digits is 7408800, while the sum is 52.

The spelling of 256573324717 in words is "two hundred fifty-six billion, five hundred seventy-three million, three hundred twenty-four thousand, seven hundred seventeen".