256030005989 has 2 divisors, whose sum is σ = 256030005990. Its totient is φ = 256030005988.

The previous prime is 256030005983. The next prime is 256030006051. The reversal of 256030005989 is 989500030652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174271181764 + 81758824225 = 417458^2 + 285935^2 .

It is a cyclic number.

It is not a de Polignac number, because 256030005989 - 2¹² = 256030001893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256030005983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128015002994 + 128015002995.

It is an arithmetic number, because the mean of its divisors is an integer number (128015002995).

Almost surely, 2^256030005989 is an apocalyptic number.

It is an amenable number.

256030005989 is a deficient number, since it is larger than the sum of its proper divisors (1).

256030005989 is an equidigital number, since it uses as much as digits as its factorization.

256030005989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 583200, while the sum is 47.

The spelling of 256030005989 in words is "two hundred fifty-six billion, thirty million, five thousand, nine hundred eighty-nine".