256452824785 has 8 divisors (see below), whose sum is σ = 308044809576. Its totient is φ = 204961313280.

The previous prime is 256452824731. The next prime is 256452824801. The reversal of 256452824785 is 587428254652.

It can be written as a sum of positive squares in 4 ways, for example, as 18769274001 + 237683550784 = 137001^2 + 487528^2 .

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

It is not a de Polignac number, because 256452824785 - 2⁷ = 256452824657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 25112704 + ... + 25122913.

It is an arithmetic number, because the mean of its divisors is an integer number (38505601197).

Almost surely, 2^256452824785 is an apocalyptic number.

It is an amenable number.

256452824785 is a deficient number, since it is larger than the sum of its proper divisors (51591984791).

256452824785 is a wasteful number, since it uses less digits than its factorization.

256452824785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50236643.

The product of its digits is 43008000, while the sum is 58.

The spelling of 256452824785 in words is "two hundred fifty-six billion, four hundred fifty-two million, eight hundred twenty-four thousand, seven hundred eighty-five".