256216046238 has 32 divisors (see below), whose sum is σ = 572067448320. Its totient is φ = 85000580280.

The previous prime is 256216046221. The next prime is 256216046243. The reversal of 256216046238 is 832640612652.

256216046238 is a `hidden beast` number, since 2 + 5 + 6 + 2 + 1 + 604 + 6 + 2 + 38 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 256216046193 and 256216046202.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 11232070 + ... + 11254857.

It is an arithmetic number, because the mean of its divisors is an integer number (17877107760).

Almost surely, 2^256216046238 is an apocalyptic number.

256216046238 is an abundant number, since it is smaller than the sum of its proper divisors (315851402082).

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

256216046238 is a wasteful number, since it uses less digits than its factorization.

256216046238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22487149 (or 22487143 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 256216046238 in words is "two hundred fifty-six billion, two hundred sixteen million, forty-six thousand, two hundred thirty-eight".