256396784848 has 40 divisors (see below), whose sum is σ = 502057116288. Its totient is φ = 126837699072.

The previous prime is 256396784773. The next prime is 256396784849. The reversal of 256396784848 is 848487693652.

It is a happy number.

256396784848 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×256396784848² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256396784849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 891961 + ... + 1143847.

Almost surely, 2^256396784848 is an apocalyptic number.

It is an amenable number.

256396784848 is a deficient number, since it is larger than the sum of its proper divisors (245660331440).

256396784848 is a wasteful number, since it uses less digits than its factorization.

256396784848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252571 (or 252565 counting only the distinct ones).

The product of its digits is 557383680, while the sum is 70.

The spelling of 256396784848 in words is "two hundred fifty-six billion, three hundred ninety-six million, seven hundred eighty-four thousand, eight hundred forty-eight".