256144406564 has 12 divisors (see below), whose sum is σ = 471844959600. Its totient is φ = 121331560968.

The previous prime is 256144406549. The next prime is 256144406569. The reversal of 256144406564 is 465604441652.

256144406564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (256144406569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1685160494 + ... + 1685160645.

It is an arithmetic number, because the mean of its divisors is an integer number (39320413300).

Almost surely, 2^256144406564 is an apocalyptic number.

It is an amenable number.

256144406564 is a deficient number, since it is larger than the sum of its proper divisors (215700553036).

256144406564 is a wasteful number, since it uses less digits than its factorization.

256144406564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3370321162 (or 3370321160 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 47.

The spelling of 256144406564 in words is "two hundred fifty-six billion, one hundred forty-four million, four hundred six thousand, five hundred sixty-four".