256064430271 has 8 divisors (see below), whose sum is σ = 277161502464. Its totient is φ = 235167330720.

The previous prime is 256064430191. The next prime is 256064430283. The reversal of 256064430271 is 172034460652.

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 256064430271 - 2¹⁵ = 256064397503 is a prime.

It is a super-2 number, since 2×256064430271² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256064439271) 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, 49990495 + ... + 49995616.

It is an arithmetic number, because the mean of its divisors is an integer number (34645187808).

Almost surely, 2^256064430271 is an apocalyptic number.

256064430271 is a deficient number, since it is larger than the sum of its proper divisors (21097072193).

256064430271 is a wasteful number, since it uses less digits than its factorization.

256064430271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99986321.

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 256064430271 in words is "two hundred fifty-six billion, sixty-four million, four hundred thirty thousand, two hundred seventy-one".