256008894909 has 8 divisors (see below), whose sum is σ = 341373228000. Its totient is φ = 170658579216.

The previous prime is 256008894887. The next prime is 256008894943. The reversal of 256008894909 is 909498800652.

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

It is not a de Polignac number, because 256008894909 - 2⁹ = 256008894397 is a prime.

It is a super-2 number, since 2×256008894909² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256008894959) 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, 3461659 + ... + 3534840.

It is an arithmetic number, because the mean of its divisors is an integer number (42671653500).

Almost surely, 2^256008894909 is an apocalyptic number.

It is an amenable number.

256008894909 is a deficient number, since it is larger than the sum of its proper divisors (85364333091).

256008894909 is a wasteful number, since it uses less digits than its factorization.

256008894909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7008699.

The product of its (nonzero) digits is 11197440, while the sum is 60.

The spelling of 256008894909 in words is "two hundred fifty-six billion, eight million, eight hundred ninety-four thousand, nine hundred nine".