256178658448 has 40 divisors (see below), whose sum is σ = 498993955200. Its totient is φ = 127407256704.

The previous prime is 256178658431. The next prime is 256178658469. The reversal of 256178658448 is 844856871652.

It is a self number, because there is not a number n which added to its sum of digits gives 256178658448.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3338658 + ... + 3414526.

It is an arithmetic number, because the mean of its divisors is an integer number (12474848880).

Almost surely, 2^256178658448 is an apocalyptic number.

It is an amenable number.

256178658448 is a deficient number, since it is larger than the sum of its proper divisors (242815296752).

256178658448 is a wasteful number, since it uses less digits than its factorization.

256178658448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76999 (or 76993 counting only the distinct ones).

The product of its digits is 103219200, while the sum is 64.

The spelling of 256178658448 in words is "two hundred fifty-six billion, one hundred seventy-eight million, six hundred fifty-eight thousand, four hundred forty-eight".