257785848456 has 64 divisors (see below), whose sum is σ = 653170003200. Its totient is φ = 84774670848.

The previous prime is 257785848421. The next prime is 257785848457. The reversal of 257785848456 is 654848587752.

It is not an unprimeable number, because it can be changed into a prime (257785848457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 398065 + ... + 820991.

It is an arithmetic number, because the mean of its divisors is an integer number (10205781300).

Almost surely, 2^257785848456 is an apocalyptic number.

It is an amenable number.

257785848456 is an abundant number, since it is smaller than the sum of its proper divisors (395384154744).

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

257785848456 is a wasteful number, since it uses less digits than its factorization.

257785848456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423278 (or 423274 counting only the distinct ones).

The product of its digits is 602112000, while the sum is 69.

The spelling of 257785848456 in words is "two hundred fifty-seven billion, seven hundred eighty-five million, eight hundred forty-eight thousand, four hundred fifty-six".