256161244241 has 8 divisors (see below), whose sum is σ = 292895198400. Its totient is φ = 219462162768.

The previous prime is 256161244189. The next prime is 256161244253. The reversal of 256161244241 is 142442161652.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256161244241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256161244195 and 256161244204.

It is not an unprimeable number, because it can be changed into a prime (256161241241) 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, 8702426 + ... + 8731811.

It is an arithmetic number, because the mean of its divisors is an integer number (36611899800).

Almost surely, 2^256161244241 is an apocalyptic number.

It is an amenable number.

256161244241 is a deficient number, since it is larger than the sum of its proper divisors (36733954159).

256161244241 is a wasteful number, since it uses less digits than its factorization.

256161244241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17436343.

The product of its digits is 92160, while the sum is 38.

The spelling of 256161244241 in words is "two hundred fifty-six billion, one hundred sixty-one million, two hundred forty-four thousand, two hundred forty-one".