256724033221327 has 8 divisors (see below), whose sum is σ = 293673356199200. Its totient is φ = 219843325515744.

The previous prime is 256724033221319. The next prime is 256724033221349. The reversal of 256724033221327 is 723122330427652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256724033221327 - 2³ = 256724033221319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256724033221307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17153810052 + ... + 17153825017.

It is an arithmetic number, because the mean of its divisors is an integer number (36709169524900).

Almost surely, 2^{256724033221327} is an apocalyptic number.

256724033221327 is a deficient number, since it is larger than the sum of its proper divisors (36949322977873).

256724033221327 is a wasteful number, since it uses less digits than its factorization.

256724033221327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34307636145.

The product of its (nonzero) digits is 5080320, while the sum is 49.

Adding to 256724033221327 its reverse (723122330427652), we get a palindrome (979846363648979).

The spelling of 256724033221327 in words is "two hundred fifty-six trillion, seven hundred twenty-four billion, thirty-three million, two hundred twenty-one thousand, three hundred twenty-seven".