256438565159 has 8 divisors (see below), whose sum is σ = 305814935040. Its totient is φ = 210247767576.

The previous prime is 256438565137. The next prime is 256438565179. The reversal of 256438565159 is 951565834652.

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

It is not a de Polignac number, because 256438565159 - 2¹⁶ = 256438499623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256438565098 and 256438565107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256438565179) 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, 796392899 + ... + 796393220.

It is an arithmetic number, because the mean of its divisors is an integer number (38226866880).

Almost surely, 2^256438565159 is an apocalyptic number.

256438565159 is a deficient number, since it is larger than the sum of its proper divisors (49376369881).

256438565159 is a wasteful number, since it uses less digits than its factorization.

256438565159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592786149.

The product of its digits is 38880000, while the sum is 59.

The spelling of 256438565159 in words is "two hundred fifty-six billion, four hundred thirty-eight million, five hundred sixty-five thousand, one hundred fifty-nine".