256432488313 has 8 divisors (see below), whose sum is σ = 265283325000. Its totient is φ = 247582207488.

The previous prime is 256432488311. The next prime is 256432488401. The reversal of 256432488313 is 313884234652.

It can be written as a sum of positive squares in 4 ways, for example, as 33958012729 + 222474475584 = 184277^2 + 471672^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 256432488313 - 2¹ = 256432488311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256432488311) 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 7 ways as a sum of consecutive naturals, for example, 942313 + ... + 1183561.

It is an arithmetic number, because the mean of its divisors is an integer number (33160415625).

Almost surely, 2^256432488313 is an apocalyptic number.

It is an amenable number.

256432488313 is a deficient number, since it is larger than the sum of its proper divisors (8850836687).

256432488313 is a wasteful number, since it uses less digits than its factorization.

256432488313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277931.

The product of its digits is 3317760, while the sum is 49.

The spelling of 256432488313 in words is "two hundred fifty-six billion, four hundred thirty-two million, four hundred eighty-eight thousand, three hundred thirteen".