256168441 has 8 divisors (see below), whose sum is σ = 257647104. Its totient is φ = 254694240.

The previous prime is 256168417. The next prime is 256168477. The reversal of 256168441 is 144861652.

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 256168441 - 2¹⁵ = 256135673 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256168441.

It is not an unprimeable number, because it can be changed into a prime (256168541) 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, 231696 + ... + 232798.

It is an arithmetic number, because the mean of its divisors is an integer number (32205888).

Almost surely, 2^256168441 is an apocalyptic number.

It is an amenable number.

256168441 is a deficient number, since it is larger than the sum of its proper divisors (1478663).

256168441 is a wasteful number, since it uses less digits than its factorization.

256168441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231.

The product of its digits is 46080, while the sum is 37.

The square root of 256168441 is about 16005.2629156787. The cubic root of 256168441 is about 635.0996524531.

The spelling of 256168441 in words is "two hundred fifty-six million, one hundred sixty-eight thousand, four hundred forty-one".