256411851 has 8 divisors (see below), whose sum is σ = 343618704. Its totient is φ = 170073120.

The previous prime is 256411807. The next prime is 256411861. The reversal of 256411851 is 158114652.

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

It is a de Polignac number, because none of the positive numbers 2^k-256411851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256411861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216340 + ... + 217521.

It is an arithmetic number, because the mean of its divisors is an integer number (42952338).

Almost surely, 2^256411851 is an apocalyptic number.

256411851 is a deficient number, since it is larger than the sum of its proper divisors (87206853).

256411851 is a wasteful number, since it uses less digits than its factorization.

256411851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434061.

The product of its digits is 9600, while the sum is 33.

The square root of 256411851 is about 16012.8651714801. The cubic root of 256411851 is about 635.3007449689.

The spelling of 256411851 in words is "two hundred fifty-six million, four hundred eleven thousand, eight hundred fifty-one".