256789755903 has 64 divisors (see below), whose sum is σ = 378449584128. Its totient is φ = 154173788160.

The previous prime is 256789755899. The next prime is 256789755907. The reversal of 256789755903 is 309557987652.

It is an interprime number because it is at equal distance from previous prime (256789755899) and next prime (256789755907).

It is not a de Polignac number, because 256789755903 - 2² = 256789755899 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256789755907) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 52010851 + ... + 52015787.

It is an arithmetic number, because the mean of its divisors is an integer number (5913274752).

Almost surely, 2^256789755903 is an apocalyptic number.

256789755903 is a deficient number, since it is larger than the sum of its proper divisors (121659828225).

256789755903 is a wasteful number, since it uses less digits than its factorization.

256789755903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5352.

The product of its (nonzero) digits is 142884000, while the sum is 66.

The spelling of 256789755903 in words is "two hundred fifty-six billion, seven hundred eighty-nine million, seven hundred fifty-five thousand, nine hundred three".