256608911 has 8 divisors (see below), whose sum is σ = 276578400. Its totient is φ = 236672352.

The previous prime is 256608901. The next prime is 256608959. The reversal of 256608911 is 119806652.

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-256608911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256608901) 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, 9365 + ... + 24513.

It is an arithmetic number, because the mean of its divisors is an integer number (34572300).

Almost surely, 2^256608911 is an apocalyptic number.

256608911 is a deficient number, since it is larger than the sum of its proper divisors (19969489).

256608911 is a wasteful number, since it uses less digits than its factorization.

256608911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16465.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 256608911 is about 16019.0171671049. The cubic root of 256608911 is about 635.4634523563.

The spelling of 256608911 in words is "two hundred fifty-six million, six hundred eight thousand, nine hundred eleven".