256678305792 has 56 divisors (see below), whose sum is σ = 684433770576. Its totient is φ = 85559427072.

The previous prime is 256678305787. The next prime is 256678305811. The reversal of 256678305792 is 297503876652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5197558 + ... + 5246709.

Almost surely, 2^256678305792 is an apocalyptic number.

It is an amenable number.

256678305792 is an abundant number, since it is smaller than the sum of its proper divisors (427755464784).

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

256678305792 is an equidigital number, since it uses as much as digits as its factorization.

256678305792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10444296 (or 10444272 counting only the distinct ones).

The product of its (nonzero) digits is 38102400, while the sum is 60.

The spelling of 256678305792 in words is "two hundred fifty-six billion, six hundred seventy-eight million, three hundred five thousand, seven hundred ninety-two".