256025785889 has 8 divisors (see below), whose sum is σ = 266709315840. Its totient is φ = 245493795600.

The previous prime is 256025785853. The next prime is 256025785913. The reversal of 256025785889 is 988587520652.

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-256025785889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256025782889) 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, 37881467 + ... + 37888224.

It is an arithmetic number, because the mean of its divisors is an integer number (33338664480).

Almost surely, 2^256025785889 is an apocalyptic number.

It is an amenable number.

256025785889 is a deficient number, since it is larger than the sum of its proper divisors (10683529951).

256025785889 is a wasteful number, since it uses less digits than its factorization.

256025785889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75769831.

The product of its (nonzero) digits is 96768000, while the sum is 65.

The spelling of 256025785889 in words is "two hundred fifty-six billion, twenty-five million, seven hundred eighty-five thousand, eight hundred eighty-nine".