256575517716 has 96 divisors (see below), whose sum is σ = 714504204288. Its totient is φ = 70065515520.

The previous prime is 256575517703. The next prime is 256575517717. The reversal of 256575517716 is 617715575652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256575517717) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2466436 + ... + 2568356.

It is an arithmetic number, because the mean of its divisors is an integer number (7442752128).

Almost surely, 2^256575517716 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256575517716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357252102144).

256575517716 is an abundant number, since it is smaller than the sum of its proper divisors (457928686572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256575517716 is a wasteful number, since it uses less digits than its factorization.

256575517716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103261 (or 103259 counting only the distinct ones).

The product of its digits is 15435000, while the sum is 57.

The spelling of 256575517716 in words is "two hundred fifty-six billion, five hundred seventy-five million, five hundred seventeen thousand, seven hundred sixteen".