256811018 has 8 divisors (see below), whose sum is σ = 388250112. Its totient is φ = 127394316.

The previous prime is 256810951. The next prime is 256811029. The reversal of 256811018 is 810118652.

256811018 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505280 + ... + 505787.

It is an arithmetic number, because the mean of its divisors is an integer number (48531264).

Almost surely, 2^256811018 is an apocalyptic number.

256811018 is a deficient number, since it is larger than the sum of its proper divisors (131439094).

256811018 is a wasteful number, since it uses less digits than its factorization.

256811018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011196.

The product of its (nonzero) digits is 3840, while the sum is 32.

The square root of 256811018 is about 16025.3242712901. The cubic root of 256811018 is about 635.6302404183.

The spelling of 256811018 in words is "two hundred fifty-six million, eight hundred eleven thousand, eighteen".