256724033221328 has 40 divisors (see below), whose sum is σ = 499763798903040. Its totient is φ = 127752739107840.

The previous prime is 256724033221319. The next prime is 256724033221349. The reversal of 256724033221328 is 823122330427652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 913705601 + ... + 913986527.

It is an arithmetic number, because the mean of its divisors is an integer number (12494094972576).

Almost surely, 2^{256724033221328} is an apocalyptic number.

It is an amenable number.

256724033221328 is a deficient number, since it is larger than the sum of its proper divisors (243039765681712).

256724033221328 is a wasteful number, since it uses less digits than its factorization.

256724033221328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551835 (or 551829 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 50.

The spelling of 256724033221328 in words is "two hundred fifty-six trillion, seven hundred twenty-four billion, thirty-three million, two hundred twenty-one thousand, three hundred twenty-eight".