256331543435 has 32 divisors (see below), whose sum is σ = 353268518400. Its totient is φ = 176588156160.

The previous prime is 256331543423. The next prime is 256331543437. The reversal of 256331543435 is 534345133652.

It is not a de Polignac number, because 256331543435 - 2¹⁴ = 256331527051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256331543437) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 13258706 + ... + 13278024.

It is an arithmetic number, because the mean of its divisors is an integer number (11039641200).

Almost surely, 2^256331543435 is an apocalyptic number.

256331543435 is a deficient number, since it is larger than the sum of its proper divisors (96936974965).

256331543435 is a wasteful number, since it uses less digits than its factorization.

256331543435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32051.

The product of its digits is 1944000, while the sum is 44.

The spelling of 256331543435 in words is "two hundred fifty-six billion, three hundred thirty-one million, five hundred forty-three thousand, four hundred thirty-five".