256438464359 has 32 divisors (see below), whose sum is σ = 328425733632. Its totient is φ = 194380560000.

The previous prime is 256438464341. The next prime is 256438464361. The reversal of 256438464359 is 953464834652.

It is not a de Polignac number, because 256438464359 - 2²⁴ = 256421687143 is a prime.

It is a super-2 number, since 2×256438464359² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256438464298 and 256438464307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256438464379) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25895309 + ... + 25905209.

It is an arithmetic number, because the mean of its divisors is an integer number (10263304176).

Almost surely, 2^256438464359 is an apocalyptic number.

256438464359 is a deficient number, since it is larger than the sum of its proper divisors (71987269273).

256438464359 is a wasteful number, since it uses less digits than its factorization.

256438464359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19047.

The product of its digits is 74649600, while the sum is 59.

The spelling of 256438464359 in words is "two hundred fifty-six billion, four hundred thirty-eight million, four hundred sixty-four thousand, three hundred fifty-nine".