256536329 has 8 divisors (see below), whose sum is σ = 295779840. Its totient is φ = 217941696.

The previous prime is 256536311. The next prime is 256536389. The reversal of 256536329 is 923635652.

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

It is not a de Polignac number, because 256536329 - 2¹² = 256532233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256536389) 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, 161369 + ... + 162950.

It is an arithmetic number, because the mean of its divisors is an integer number (36972480).

Almost surely, 2^256536329 is an apocalyptic number.

It is an amenable number.

256536329 is a deficient number, since it is larger than the sum of its proper divisors (39243511).

256536329 is a wasteful number, since it uses less digits than its factorization.

256536329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324439.

The product of its digits is 291600, while the sum is 41.

The square root of 256536329 is about 16016.7515120888. The cubic root of 256536329 is about 635.4035329541.

The spelling of 256536329 in words is "two hundred fifty-six million, five hundred thirty-six thousand, three hundred twenty-nine".