256449335844 has 48 divisors (see below), whose sum is σ = 645734569088. Its totient is φ = 78745436928.

The previous prime is 256449335827. The next prime is 256449335869. The reversal of 256449335844 is 448533944652.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1611817 + ... + 1763760.

Almost surely, 2^256449335844 is an apocalyptic number.

It is an amenable number.

256449335844 is an abundant number, since it is smaller than the sum of its proper divisors (389285233244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256449335844 is a wasteful number, since it uses less digits than its factorization.

256449335844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3376084 (or 3376082 counting only the distinct ones).

The product of its digits is 49766400, while the sum is 57.

The spelling of 256449335844 in words is "two hundred fifty-six billion, four hundred forty-nine million, three hundred thirty-five thousand, eight hundred forty-four".